Audi 100 '89 No Power.
#1
Guest
Posts: n/a
Audi 100 '89 No Power.
Hi,
My Audi 100 '89 (manual transmission) has Abruptly developed a problem
while my wife was driving uphill and was changing to a lower gear.
This happened about 3 years ago.
Description of problem:
- The car runs very rough as if only 3 or 4 of the 5 cylinders were
firing during idle and attempted ride on the road.
- It always starts OK even after not being started for months.
- When I try to rev up the engine the car struggles to increase the
RPM, however when I release my foot from the gas pedal the RPM seems to
pick up. I can then sort of pump the gas pedal and get the RPM quite
high, as high as I want to.
- I sometimes attempt to drive the car but it has consistently very
low power!!!
I have been trying to get to the bottom of the problem with no luck
trying various things over the last three years.
I have done the following (don't remember all the things I've done):
- replaced fuel filter,
- cleaned air filter,
- tried different spark plugs, cables, distributor cap
- I have looked extensively for a bad ground connection. I have
actually had a problem with my 85Audi5000 which closely resembled this
one where the problem was a broken ground wire.
- I have checked various wiring from the Fuel injection Control unit
and from the Ignition Control Unit.
- I have removed the ICV and made sure it is not stuck
- I have looked extensively for vacuum leaks.
The problem has never budged. The problem happened from one second to
the next and subsequently never subsided regardless of which cables I
touched while the engine was running.
I hope that someone has seen such problem before and had more luck than
me dealing with the problem.
Thank you for any hints or advice,
Andre
My Audi 100 '89 (manual transmission) has Abruptly developed a problem
while my wife was driving uphill and was changing to a lower gear.
This happened about 3 years ago.
Description of problem:
- The car runs very rough as if only 3 or 4 of the 5 cylinders were
firing during idle and attempted ride on the road.
- It always starts OK even after not being started for months.
- When I try to rev up the engine the car struggles to increase the
RPM, however when I release my foot from the gas pedal the RPM seems to
pick up. I can then sort of pump the gas pedal and get the RPM quite
high, as high as I want to.
- I sometimes attempt to drive the car but it has consistently very
low power!!!
I have been trying to get to the bottom of the problem with no luck
trying various things over the last three years.
I have done the following (don't remember all the things I've done):
- replaced fuel filter,
- cleaned air filter,
- tried different spark plugs, cables, distributor cap
- I have looked extensively for a bad ground connection. I have
actually had a problem with my 85Audi5000 which closely resembled this
one where the problem was a broken ground wire.
- I have checked various wiring from the Fuel injection Control unit
and from the Ignition Control Unit.
- I have removed the ICV and made sure it is not stuck
- I have looked extensively for vacuum leaks.
The problem has never budged. The problem happened from one second to
the next and subsequently never subsided regardless of which cables I
touched while the engine was running.
I hope that someone has seen such problem before and had more luck than
me dealing with the problem.
Thank you for any hints or advice,
Andre
#2
Guest
Posts: n/a
Re: Audi 100 '89 No Power.
Andre,
Please say that you have pulled the diagnostic codes from the engine control
unit: http://www.sjmautotechnik.com/troubl...ng/10naecu.htm Don't just
buy/replace parts without using the onboard diagnostic first.
Failing that, could you have an obstruction in the exhaust system, like a
plugged catylitic converter? - try disconnecting the exhaust before the cat
and seeing if the power returns - the car will be super loud, which,
apparently, is cool these days
Scott Mockry's site is an excellent one to review for trouble shooting - so
is www.audifans.com and the newsgroups at www.audiworld.com
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"Andre" <andrez83@hotmail.com> wrote in message
news:1147278384.494396.321750@y43g2000cwc.googlegr oups.com...
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
Please say that you have pulled the diagnostic codes from the engine control
unit: http://www.sjmautotechnik.com/troubl...ng/10naecu.htm Don't just
buy/replace parts without using the onboard diagnostic first.
Failing that, could you have an obstruction in the exhaust system, like a
plugged catylitic converter? - try disconnecting the exhaust before the cat
and seeing if the power returns - the car will be super loud, which,
apparently, is cool these days
Scott Mockry's site is an excellent one to review for trouble shooting - so
is www.audifans.com and the newsgroups at www.audiworld.com
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"Andre" <andrez83@hotmail.com> wrote in message
news:1147278384.494396.321750@y43g2000cwc.googlegr oups.com...
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
#3
Guest
Posts: n/a
Re: Audi 100 '89 No Power.
Andre,
Please say that you have pulled the diagnostic codes from the engine control
unit: http://www.sjmautotechnik.com/troubl...ng/10naecu.htm Don't just
buy/replace parts without using the onboard diagnostic first.
Failing that, could you have an obstruction in the exhaust system, like a
plugged catylitic converter? - try disconnecting the exhaust before the cat
and seeing if the power returns - the car will be super loud, which,
apparently, is cool these days
Scott Mockry's site is an excellent one to review for trouble shooting - so
is www.audifans.com and the newsgroups at www.audiworld.com
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"Andre" <andrez83@hotmail.com> wrote in message
news:1147278384.494396.321750@y43g2000cwc.googlegr oups.com...
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
Please say that you have pulled the diagnostic codes from the engine control
unit: http://www.sjmautotechnik.com/troubl...ng/10naecu.htm Don't just
buy/replace parts without using the onboard diagnostic first.
Failing that, could you have an obstruction in the exhaust system, like a
plugged catylitic converter? - try disconnecting the exhaust before the cat
and seeing if the power returns - the car will be super loud, which,
apparently, is cool these days
Scott Mockry's site is an excellent one to review for trouble shooting - so
is www.audifans.com and the newsgroups at www.audiworld.com
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"Andre" <andrez83@hotmail.com> wrote in message
news:1147278384.494396.321750@y43g2000cwc.googlegr oups.com...
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
#4
Guest
Posts: n/a
Re: Audi 100 '89 No Power.
Andre,
Please say that you have pulled the diagnostic codes from the engine control
unit: http://www.sjmautotechnik.com/troubl...ng/10naecu.htm Don't just
buy/replace parts without using the onboard diagnostic first.
Failing that, could you have an obstruction in the exhaust system, like a
plugged catylitic converter? - try disconnecting the exhaust before the cat
and seeing if the power returns - the car will be super loud, which,
apparently, is cool these days
Scott Mockry's site is an excellent one to review for trouble shooting - so
is www.audifans.com and the newsgroups at www.audiworld.com
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"Andre" <andrez83@hotmail.com> wrote in message
news:1147278384.494396.321750@y43g2000cwc.googlegr oups.com...
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
Please say that you have pulled the diagnostic codes from the engine control
unit: http://www.sjmautotechnik.com/troubl...ng/10naecu.htm Don't just
buy/replace parts without using the onboard diagnostic first.
Failing that, could you have an obstruction in the exhaust system, like a
plugged catylitic converter? - try disconnecting the exhaust before the cat
and seeing if the power returns - the car will be super loud, which,
apparently, is cool these days
Scott Mockry's site is an excellent one to review for trouble shooting - so
is www.audifans.com and the newsgroups at www.audiworld.com
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"Andre" <andrez83@hotmail.com> wrote in message
news:1147278384.494396.321750@y43g2000cwc.googlegr oups.com...
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
#8
Guest
Posts: n/a
Re: Audi 100 '89 No Power.
I previously owned four T44s NA 5 spd.
The problem you describe sounds a lot like a clogged fuel filter but I see that
you have already changed that.
Another source of fuel problems can be due to the lining of the tank flaking off
and clogging the inlet screen on the fuel pump. This was corrected in the later
years of the T44s so may not be the cause. If it is the problem the factory
recommended fix is to cut off the fuel pump inlet screen and let the fuel filter
catch the crud and change it more often.
Bad ECU ground on the head?
Clogged cat? Quick test is to pull off the blue cover from the steel line that
runs to the down pipe (for testing O2) and if there is a lot of pressure forced
out then probably clogged cat.
Hall sensor loose connection in the distributor?
The fusees along the side of the main relay box are for engine management and
ICU. They look like spares but aren't. Any bad?
Good luck.
Andre wrote:
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
The problem you describe sounds a lot like a clogged fuel filter but I see that
you have already changed that.
Another source of fuel problems can be due to the lining of the tank flaking off
and clogging the inlet screen on the fuel pump. This was corrected in the later
years of the T44s so may not be the cause. If it is the problem the factory
recommended fix is to cut off the fuel pump inlet screen and let the fuel filter
catch the crud and change it more often.
Bad ECU ground on the head?
Clogged cat? Quick test is to pull off the blue cover from the steel line that
runs to the down pipe (for testing O2) and if there is a lot of pressure forced
out then probably clogged cat.
Hall sensor loose connection in the distributor?
The fusees along the side of the main relay box are for engine management and
ICU. They look like spares but aren't. Any bad?
Good luck.
Andre wrote:
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
#9
Guest
Posts: n/a
Re: Audi 100 '89 No Power.
I previously owned four T44s NA 5 spd.
The problem you describe sounds a lot like a clogged fuel filter but I see that
you have already changed that.
Another source of fuel problems can be due to the lining of the tank flaking off
and clogging the inlet screen on the fuel pump. This was corrected in the later
years of the T44s so may not be the cause. If it is the problem the factory
recommended fix is to cut off the fuel pump inlet screen and let the fuel filter
catch the crud and change it more often.
Bad ECU ground on the head?
Clogged cat? Quick test is to pull off the blue cover from the steel line that
runs to the down pipe (for testing O2) and if there is a lot of pressure forced
out then probably clogged cat.
Hall sensor loose connection in the distributor?
The fusees along the side of the main relay box are for engine management and
ICU. They look like spares but aren't. Any bad?
Good luck.
Andre wrote:
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
The problem you describe sounds a lot like a clogged fuel filter but I see that
you have already changed that.
Another source of fuel problems can be due to the lining of the tank flaking off
and clogging the inlet screen on the fuel pump. This was corrected in the later
years of the T44s so may not be the cause. If it is the problem the factory
recommended fix is to cut off the fuel pump inlet screen and let the fuel filter
catch the crud and change it more often.
Bad ECU ground on the head?
Clogged cat? Quick test is to pull off the blue cover from the steel line that
runs to the down pipe (for testing O2) and if there is a lot of pressure forced
out then probably clogged cat.
Hall sensor loose connection in the distributor?
The fusees along the side of the main relay box are for engine management and
ICU. They look like spares but aren't. Any bad?
Good luck.
Andre wrote:
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
#10
Guest
Posts: n/a
Re: Audi 100 '89 No Power.
I previously owned four T44s NA 5 spd.
The problem you describe sounds a lot like a clogged fuel filter but I see that
you have already changed that.
Another source of fuel problems can be due to the lining of the tank flaking off
and clogging the inlet screen on the fuel pump. This was corrected in the later
years of the T44s so may not be the cause. If it is the problem the factory
recommended fix is to cut off the fuel pump inlet screen and let the fuel filter
catch the crud and change it more often.
Bad ECU ground on the head?
Clogged cat? Quick test is to pull off the blue cover from the steel line that
runs to the down pipe (for testing O2) and if there is a lot of pressure forced
out then probably clogged cat.
Hall sensor loose connection in the distributor?
The fusees along the side of the main relay box are for engine management and
ICU. They look like spares but aren't. Any bad?
Good luck.
Andre wrote:
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>
The problem you describe sounds a lot like a clogged fuel filter but I see that
you have already changed that.
Another source of fuel problems can be due to the lining of the tank flaking off
and clogging the inlet screen on the fuel pump. This was corrected in the later
years of the T44s so may not be the cause. If it is the problem the factory
recommended fix is to cut off the fuel pump inlet screen and let the fuel filter
catch the crud and change it more often.
Bad ECU ground on the head?
Clogged cat? Quick test is to pull off the blue cover from the steel line that
runs to the down pipe (for testing O2) and if there is a lot of pressure forced
out then probably clogged cat.
Hall sensor loose connection in the distributor?
The fusees along the side of the main relay box are for engine management and
ICU. They look like spares but aren't. Any bad?
Good luck.
Andre wrote:
> Hi,
>
> My Audi 100 '89 (manual transmission) has Abruptly developed a problem
> while my wife was driving uphill and was changing to a lower gear.
> This happened about 3 years ago.
>
> Description of problem:
> - The car runs very rough as if only 3 or 4 of the 5 cylinders were
> firing during idle and attempted ride on the road.
> - It always starts OK even after not being started for months.
> - When I try to rev up the engine the car struggles to increase the
> RPM, however when I release my foot from the gas pedal the RPM seems to
> pick up. I can then sort of pump the gas pedal and get the RPM quite
> high, as high as I want to.
> - I sometimes attempt to drive the car but it has consistently very
> low power!!!
>
> I have been trying to get to the bottom of the problem with no luck
> trying various things over the last three years.
> I have done the following (don't remember all the things I've done):
> - replaced fuel filter,
> - cleaned air filter,
> - tried different spark plugs, cables, distributor cap
> - I have looked extensively for a bad ground connection. I have
> actually had a problem with my 85Audi5000 which closely resembled this
> one where the problem was a broken ground wire.
> - I have checked various wiring from the Fuel injection Control unit
> and from the Ignition Control Unit.
> - I have removed the ICV and made sure it is not stuck
> - I have looked extensively for vacuum leaks.
>
> The problem has never budged. The problem happened from one second to
> the next and subsequently never subsided regardless of which cables I
> touched while the engine was running.
>
> I hope that someone has seen such problem before and had more luck than
> me dealing with the problem.
>
> Thank you for any hints or advice,
>
> Andre
>