Air in diesel fuel line Help!
10-13-2007, 12:42 AM
#11
Guest
Posts: n/a
Re: Air in diesel fuel line Help!
chilldown wrote:
> I opened the filetr twice after that and yes I filled the filter
> everytime. Somehow I noticed that vacuum is not building up.
I have a hard time understanding you, but from what i gather this
happened only after you filled up the tank? Your model is a little old
but most TDI's came equipped with an in-tank fuel transfer pump with a
check valve that often times became stuck open. It would also help to
rule out any damaged parts of the tank and lines up to the belt driven
pump that would be pulling in air as the pump runs.
--
Madesio
> I opened the filetr twice after that and yes I filled the filter
> everytime. Somehow I noticed that vacuum is not building up.
I have a hard time understanding you, but from what i gather this
happened only after you filled up the tank? Your model is a little old
but most TDI's came equipped with an in-tank fuel transfer pump with a
check valve that often times became stuck open. It would also help to
rule out any damaged parts of the tank and lines up to the belt driven
pump that would be pulling in air as the pump runs.
--
Madesio
10-13-2007, 12:42 AM
#12
Guest
Posts: n/a
Re: Air in diesel fuel line Help!
chilldown wrote:
> I opened the filetr twice after that and yes I filled the filter
> everytime. Somehow I noticed that vacuum is not building up.
I have a hard time understanding you, but from what i gather this
happened only after you filled up the tank? Your model is a little old
but most TDI's came equipped with an in-tank fuel transfer pump with a
check valve that often times became stuck open. It would also help to
rule out any damaged parts of the tank and lines up to the belt driven
pump that would be pulling in air as the pump runs.
--
Madesio
> I opened the filetr twice after that and yes I filled the filter
> everytime. Somehow I noticed that vacuum is not building up.
I have a hard time understanding you, but from what i gather this
happened only after you filled up the tank? Your model is a little old
but most TDI's came equipped with an in-tank fuel transfer pump with a
check valve that often times became stuck open. It would also help to
rule out any damaged parts of the tank and lines up to the belt driven
pump that would be pulling in air as the pump runs.
--
Madesio
10-13-2007, 12:42 AM
#13
Guest
Posts: n/a
Re: Air in diesel fuel line Help!
chilldown wrote:
> I opened the filetr twice after that and yes I filled the filter
> everytime. Somehow I noticed that vacuum is not building up.
I have a hard time understanding you, but from what i gather this
happened only after you filled up the tank? Your model is a little old
but most TDI's came equipped with an in-tank fuel transfer pump with a
check valve that often times became stuck open. It would also help to
rule out any damaged parts of the tank and lines up to the belt driven
pump that would be pulling in air as the pump runs.
--
Madesio
> I opened the filetr twice after that and yes I filled the filter
> everytime. Somehow I noticed that vacuum is not building up.
I have a hard time understanding you, but from what i gather this
happened only after you filled up the tank? Your model is a little old
but most TDI's came equipped with an in-tank fuel transfer pump with a
check valve that often times became stuck open. It would also help to
rule out any damaged parts of the tank and lines up to the belt driven
pump that would be pulling in air as the pump runs.
--
Madesio
10-14-2007, 02:09 PM
#14
Guest
Posts: n/a
Re: Air in diesel fuel line Help!
On Oct 10, 10:33 pm, "chilldown" <chilld...@hotmail.com> wrote:
> Hello,
>
> I have driven audi 80 TD on reserve diesel till it started missing.
> Then I have tanked but it started giving white smoke. I thought that
> filter is full of dirt so I changed the filter then I noticed that there is
> air in the
> lines so today I changed all rubber lines from filter to the pump but still
> I can see air
> in the lines and the white smoke is there.
>
> My Qs is, Is it injector which is letting air? car is rough with reduced
> power
> and I already tried the injector cleaner with the fuel but so far no effect.
>
> I also tried losening the diesel intake on the injectors to check if no RPM
> reduces then
> I can spot the faulty injector but all injectors effect the RPM so I guess
> they are partially working.
>
> What shoud be the next thing to check? It was all ok before I drove to empty
> tank.
>
> Any tip is much appriciated.
>
> Thanks
The fuel system needs bleeding. ( bleeding means letting the air out )
Look for the highest point on the fuel line, there may be a bleed
screw there.
On older diesels it is not a difficult thing to do, it was not always
necessary to have pressure in the system other than gravity. New eng'
fuel systems may be different and the system may need to be
pressurised and pressurised back to the pump to remove air in the
pump(s).
One way may be to have the engine running and start at the furthest
injector from the fuel pump or filter, bleed that one and work your
way back to the nearest injector to the pump. Opening and closing the
connections one at a time, waiting about 5 secs between opening and
closing the connections. You may need to do this several times. You
shall need something to soak up or catch the fuel in.
> Hello,
>
> I have driven audi 80 TD on reserve diesel till it started missing.
> Then I have tanked but it started giving white smoke. I thought that
> filter is full of dirt so I changed the filter then I noticed that there is
> air in the
> lines so today I changed all rubber lines from filter to the pump but still
> I can see air
> in the lines and the white smoke is there.
>
> My Qs is, Is it injector which is letting air? car is rough with reduced
> power
> and I already tried the injector cleaner with the fuel but so far no effect.
>
> I also tried losening the diesel intake on the injectors to check if no RPM
> reduces then
> I can spot the faulty injector but all injectors effect the RPM so I guess
> they are partially working.
>
> What shoud be the next thing to check? It was all ok before I drove to empty
> tank.
>
> Any tip is much appriciated.
>
> Thanks
The fuel system needs bleeding. ( bleeding means letting the air out )
Look for the highest point on the fuel line, there may be a bleed
screw there.
On older diesels it is not a difficult thing to do, it was not always
necessary to have pressure in the system other than gravity. New eng'
fuel systems may be different and the system may need to be
pressurised and pressurised back to the pump to remove air in the
pump(s).
One way may be to have the engine running and start at the furthest
injector from the fuel pump or filter, bleed that one and work your
way back to the nearest injector to the pump. Opening and closing the
connections one at a time, waiting about 5 secs between opening and
closing the connections. You may need to do this several times. You
shall need something to soak up or catch the fuel in.
10-14-2007, 02:09 PM
#15
Guest
Posts: n/a
Re: Air in diesel fuel line Help!
On Oct 10, 10:33 pm, "chilldown" <chilld...@hotmail.com> wrote:
> Hello,
>
> I have driven audi 80 TD on reserve diesel till it started missing.
> Then I have tanked but it started giving white smoke. I thought that
> filter is full of dirt so I changed the filter then I noticed that there is
> air in the
> lines so today I changed all rubber lines from filter to the pump but still
> I can see air
> in the lines and the white smoke is there.
>
> My Qs is, Is it injector which is letting air? car is rough with reduced
> power
> and I already tried the injector cleaner with the fuel but so far no effect.
>
> I also tried losening the diesel intake on the injectors to check if no RPM
> reduces then
> I can spot the faulty injector but all injectors effect the RPM so I guess
> they are partially working.
>
> What shoud be the next thing to check? It was all ok before I drove to empty
> tank.
>
> Any tip is much appriciated.
>
> Thanks
The fuel system needs bleeding. ( bleeding means letting the air out )
Look for the highest point on the fuel line, there may be a bleed
screw there.
On older diesels it is not a difficult thing to do, it was not always
necessary to have pressure in the system other than gravity. New eng'
fuel systems may be different and the system may need to be
pressurised and pressurised back to the pump to remove air in the
pump(s).
One way may be to have the engine running and start at the furthest
injector from the fuel pump or filter, bleed that one and work your
way back to the nearest injector to the pump. Opening and closing the
connections one at a time, waiting about 5 secs between opening and
closing the connections. You may need to do this several times. You
shall need something to soak up or catch the fuel in.
> Hello,
>
> I have driven audi 80 TD on reserve diesel till it started missing.
> Then I have tanked but it started giving white smoke. I thought that
> filter is full of dirt so I changed the filter then I noticed that there is
> air in the
> lines so today I changed all rubber lines from filter to the pump but still
> I can see air
> in the lines and the white smoke is there.
>
> My Qs is, Is it injector which is letting air? car is rough with reduced
> power
> and I already tried the injector cleaner with the fuel but so far no effect.
>
> I also tried losening the diesel intake on the injectors to check if no RPM
> reduces then
> I can spot the faulty injector but all injectors effect the RPM so I guess
> they are partially working.
>
> What shoud be the next thing to check? It was all ok before I drove to empty
> tank.
>
> Any tip is much appriciated.
>
> Thanks
The fuel system needs bleeding. ( bleeding means letting the air out )
Look for the highest point on the fuel line, there may be a bleed
screw there.
On older diesels it is not a difficult thing to do, it was not always
necessary to have pressure in the system other than gravity. New eng'
fuel systems may be different and the system may need to be
pressurised and pressurised back to the pump to remove air in the
pump(s).
One way may be to have the engine running and start at the furthest
injector from the fuel pump or filter, bleed that one and work your
way back to the nearest injector to the pump. Opening and closing the
connections one at a time, waiting about 5 secs between opening and
closing the connections. You may need to do this several times. You
shall need something to soak up or catch the fuel in.
10-14-2007, 02:09 PM
#16
Guest
Posts: n/a
Re: Air in diesel fuel line Help!
On Oct 10, 10:33 pm, "chilldown" <chilld...@hotmail.com> wrote:
> Hello,
>
> I have driven audi 80 TD on reserve diesel till it started missing.
> Then I have tanked but it started giving white smoke. I thought that
> filter is full of dirt so I changed the filter then I noticed that there is
> air in the
> lines so today I changed all rubber lines from filter to the pump but still
> I can see air
> in the lines and the white smoke is there.
>
> My Qs is, Is it injector which is letting air? car is rough with reduced
> power
> and I already tried the injector cleaner with the fuel but so far no effect.
>
> I also tried losening the diesel intake on the injectors to check if no RPM
> reduces then
> I can spot the faulty injector but all injectors effect the RPM so I guess
> they are partially working.
>
> What shoud be the next thing to check? It was all ok before I drove to empty
> tank.
>
> Any tip is much appriciated.
>
> Thanks
The fuel system needs bleeding. ( bleeding means letting the air out )
Look for the highest point on the fuel line, there may be a bleed
screw there.
On older diesels it is not a difficult thing to do, it was not always
necessary to have pressure in the system other than gravity. New eng'
fuel systems may be different and the system may need to be
pressurised and pressurised back to the pump to remove air in the
pump(s).
One way may be to have the engine running and start at the furthest
injector from the fuel pump or filter, bleed that one and work your
way back to the nearest injector to the pump. Opening and closing the
connections one at a time, waiting about 5 secs between opening and
closing the connections. You may need to do this several times. You
shall need something to soak up or catch the fuel in.
> Hello,
>
> I have driven audi 80 TD on reserve diesel till it started missing.
> Then I have tanked but it started giving white smoke. I thought that
> filter is full of dirt so I changed the filter then I noticed that there is
> air in the
> lines so today I changed all rubber lines from filter to the pump but still
> I can see air
> in the lines and the white smoke is there.
>
> My Qs is, Is it injector which is letting air? car is rough with reduced
> power
> and I already tried the injector cleaner with the fuel but so far no effect.
>
> I also tried losening the diesel intake on the injectors to check if no RPM
> reduces then
> I can spot the faulty injector but all injectors effect the RPM so I guess
> they are partially working.
>
> What shoud be the next thing to check? It was all ok before I drove to empty
> tank.
>
> Any tip is much appriciated.
>
> Thanks
The fuel system needs bleeding. ( bleeding means letting the air out )
Look for the highest point on the fuel line, there may be a bleed
screw there.
On older diesels it is not a difficult thing to do, it was not always
necessary to have pressure in the system other than gravity. New eng'
fuel systems may be different and the system may need to be
pressurised and pressurised back to the pump to remove air in the
pump(s).
One way may be to have the engine running and start at the furthest
injector from the fuel pump or filter, bleed that one and work your
way back to the nearest injector to the pump. Opening and closing the
connections one at a time, waiting about 5 secs between opening and
closing the connections. You may need to do this several times. You
shall need something to soak up or catch the fuel in.
10-14-2007, 02:09 PM
#17
Guest
Posts: n/a
Re: Air in diesel fuel line Help!
On Oct 10, 10:33 pm, "chilldown" <chilld...@hotmail.com> wrote:
> Hello,
>
> I have driven audi 80 TD on reserve diesel till it started missing.
> Then I have tanked but it started giving white smoke. I thought that
> filter is full of dirt so I changed the filter then I noticed that there is
> air in the
> lines so today I changed all rubber lines from filter to the pump but still
> I can see air
> in the lines and the white smoke is there.
>
> My Qs is, Is it injector which is letting air? car is rough with reduced
> power
> and I already tried the injector cleaner with the fuel but so far no effect.
>
> I also tried losening the diesel intake on the injectors to check if no RPM
> reduces then
> I can spot the faulty injector but all injectors effect the RPM so I guess
> they are partially working.
>
> What shoud be the next thing to check? It was all ok before I drove to empty
> tank.
>
> Any tip is much appriciated.
>
> Thanks
The fuel system needs bleeding. ( bleeding means letting the air out )
Look for the highest point on the fuel line, there may be a bleed
screw there.
On older diesels it is not a difficult thing to do, it was not always
necessary to have pressure in the system other than gravity. New eng'
fuel systems may be different and the system may need to be
pressurised and pressurised back to the pump to remove air in the
pump(s).
One way may be to have the engine running and start at the furthest
injector from the fuel pump or filter, bleed that one and work your
way back to the nearest injector to the pump. Opening and closing the
connections one at a time, waiting about 5 secs between opening and
closing the connections. You may need to do this several times. You
shall need something to soak up or catch the fuel in.
> Hello,
>
> I have driven audi 80 TD on reserve diesel till it started missing.
> Then I have tanked but it started giving white smoke. I thought that
> filter is full of dirt so I changed the filter then I noticed that there is
> air in the
> lines so today I changed all rubber lines from filter to the pump but still
> I can see air
> in the lines and the white smoke is there.
>
> My Qs is, Is it injector which is letting air? car is rough with reduced
> power
> and I already tried the injector cleaner with the fuel but so far no effect.
>
> I also tried losening the diesel intake on the injectors to check if no RPM
> reduces then
> I can spot the faulty injector but all injectors effect the RPM so I guess
> they are partially working.
>
> What shoud be the next thing to check? It was all ok before I drove to empty
> tank.
>
> Any tip is much appriciated.
>
> Thanks
The fuel system needs bleeding. ( bleeding means letting the air out )
Look for the highest point on the fuel line, there may be a bleed
screw there.
On older diesels it is not a difficult thing to do, it was not always
necessary to have pressure in the system other than gravity. New eng'
fuel systems may be different and the system may need to be
pressurised and pressurised back to the pump to remove air in the
pump(s).
One way may be to have the engine running and start at the furthest
injector from the fuel pump or filter, bleed that one and work your
way back to the nearest injector to the pump. Opening and closing the
connections one at a time, waiting about 5 secs between opening and
closing the connections. You may need to do this several times. You
shall need something to soak up or catch the fuel in.
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