Hopefully some body can confirm my suspisions..... In the last couple
of days my 88 Audi 90 s 2.3 5 cyl lost a dramatic amount of power..
the systems are this...
If i press the gas pedal to the floor, i lose most of the power, I can
slowly accel by slowly pressing the gas, but it requires i don't rev
much over 3k rpm....
I have already done the following:
Fuel filter/air filter changed...
Tune up- plugs, wires, cap and rotor
Checked timing... Cam, Crank and distributor are all timed correct
Changed bad o2 sensor

My suspision is it is the fuel pump... does that sound like the next
logical step? the only thing i have not done is try to adjust the
mixture.. but that is for me to leave up to the pros..

Is there any way i can check the fuel pressure myself? i don't want to
$200.00 or more on a new pump if i can avoid it.

Thanks for your assistance

kevin

 

>From: kevin203ct@yahoo.com (Kevin)
>
>Hopefully some body can confirm my suspisions..... In the last couple
>of days my 88 Audi 90 s 2.3 5 cyl lost a dramatic amount of power..
>the systems are this...
>If i press the gas pedal to the floor, i lose most of the power, I can
>slowly accel by slowly pressing the gas, but it requires i don't rev
>much over 3k rpm....
>I have already done the following:
>Fuel filter/air filter changed...
>Tune up- plugs, wires, cap and rotor
>Checked timing... Cam, Crank and distributor are all timed correct
>Changed bad o2 sensor
>
>My suspision is it is the fuel pump... does that sound like the next
>logical step? the only thing i have not done is try to adjust the
>mixture.. but that is for me to leave up to the pros..
>
>Is there any way i can check the fuel pressure myself? i don't want to
>$200.00 or more on a new pump if i can avoid it.
>
>Thanks for your assistance
>
>kevin
>

Is the boot from the fuel distributor to the throttle body in excellent
condition and tightly clamped?
Intake manifold tight?
Cat. converter in good condition and not clogged?
Fuel pressure differential regulator receiving electricity?
Did you remove any fuses from your fuse box lately?

just some thoughts!
later,
dave
Reminder........
Before you criticize someone, you should walk a mile in their shoes. That way,
when you criticize them, you are a mile away from them, and you have their
shoes. Frieda Norris

 

> Is the boot from the fuel distributor to the throttle body in excellent
> condition and tightly clamped?

Yes. No tears, tightly sealed.. i just changed the air filter so i had
to remove it.. it is in good shape.

> Intake manifold tight?

It's never been removed, so i can only assume yes, i will check that.

> Cat. converter in good condition and not clogged?

Cat Core is punched.. i am in process of replacing the cat, therefore
it could not be clogged, but is not in good condition.

> Fuel pressure differential regulator receiving electricity?

I do not know.. this i have not checked.. i'll have to look it up in
my bentley manual and check that.

> Did you remove any fuses from your fuse box lately?

None at all.

At this point, the car still goes, but has no power in acceleration..
it takes me nearly as long as an 18 wheeler to get up to highway
speed... maybe not quite that long, but if i floor it,the car loses
major power, plus if i shift down and the engine revs over the 3k
mark, even without pressing the gas, the same thing happens... seems
like it can not get enough fuel to run the engine at those higher
speeds. that's is my best guess...

> just some thoughts!

Thanks for the thoughts!

Kevin

 

"Kevin" <kevin203ct@yahoo.com> wrote in message
news:327ef158.0310190626.32c0ba67@posting.google.c om...

It certainly sounds very like the symptoms when the fuel pump packed up on
my old '89 90 (KV engine, 2226 cc, no turbo, no cat) a few years back. On
the UK models the pump is on the right had side of the car underneath and it
gets quite a lot of muck showered on it. Not sure if yours is the same.
Replacement is a DIY job. It's not particularly difficult, though not
pleasant. Best to start with an empty tank. When you loosen the hose feeding
the pump from the tank, you discover what a gravity feed means. Needless to
say my pump had decided to give up the moment after I'd completely filled
the tank. IIRC I improvised by plugging the hose with a cork and tightening
a jubilee clip round it while I got the pump off, thus minimising spillage,
but it would obviously be better to get the tank down to a gallon or so and
then just drain it into a can.

That car was perhaps the best I've ever owned.

HTH.

Jonathan

 

Sounds a lot like what happens for days if you washed the engine and got
water in the distributor. BTDT

Tony
'91 100Q 5spd

dave wrote:
>>From: kevin203ct@yahoo.com (Kevin)
>>
>>Hopefully some body can confirm my suspisions..... In the last couple
>>of days my 88 Audi 90 s 2.3 5 cyl lost a dramatic amount of power..
>>the systems are this...
>>If i press the gas pedal to the floor, i lose most of the power, I can
>>slowly accel by slowly pressing the gas, but it requires i don't rev
>>much over 3k rpm....
>>I have already done the following:
>>Fuel filter/air filter changed...
>>Tune up- plugs, wires, cap and rotor
>>Checked timing... Cam, Crank and distributor are all timed correct
>>Changed bad o2 sensor
>>
>>My suspision is it is the fuel pump... does that sound like the next
>>logical step? the only thing i have not done is try to adjust the
>>mixture.. but that is for me to leave up to the pros..
>>
>>Is there any way i can check the fuel pressure myself? i don't want to
>>$200.00 or more on a new pump if i can avoid it.
>>
>>Thanks for your assistance
>>
>>kevin
>>
>
>
> Is the boot from the fuel distributor to the throttle body in excellent
> condition and tightly clamped?
> Intake manifold tight?
> Cat. converter in good condition and not clogged?
> Fuel pressure differential regulator receiving electricity?
> Did you remove any fuses from your fuse box lately?
>
> just some thoughts!
> later,
> dave
> Reminder........
> Before you criticize someone, you should walk a mile in their shoes. That way,
> when you criticize them, you are a mile away from them, and you have their
> shoes. Frieda Norris
>

 

It would figure that i just filled up the tank yesterday too.... Well,
as long as the car is still running, i'll just have to try to use up
as much of the gas as i can getting around town... at least if it
gives out locally, i won't have to get towed very far.



> It certainly sounds very like the symptoms when the fuel pump packed up on
> my old '89 90 (KV engine, 2226 cc, no turbo, no cat) a few years back. On
> the UK models the pump is on the right had side of the car underneath and it
> gets quite a lot of muck showered on it. Not sure if yours is the same.
> Replacement is a DIY job. It's not particularly difficult, though not
> pleasant. Best to start with an empty tank. When you loosen the hose feeding
> the pump from the tank, you discover what a gravity feed means. Needless to
> say my pump had decided to give up the moment after I'd completely filled
> the tank. IIRC I improvised by plugging the hose with a cork and tightening
> a jubilee clip round it while I got the pump off, thus minimising spillage,
> but it would obviously be better to get the tank down to a gallon or so and
> then just drain it into a can.
>
> That car was perhaps the best I've ever owned.
>
> HTH.
>
> Jonathan

 

I have the EXACT SAME problem with my 95 90 2.8L V6 and its driving me
crazy. I was convinced (without pulling the codes of corse) that I needed
a new O2 sensor- one of them has 111K on it. Is this not the problem? Id
hate to spend that loot if I dont have to.

 

I have the EXACT SAME problem with my 95 90 2.8L V6 and its driving me
crazy. I was convinced (without pulling the codes of corse) that I needed
a new O2 sensor- one of them has 111K on it. Is this not the problem? Id
hate to spend that loot if I dont have to.

 

I have the EXACT SAME problem with my 95 90 2.8L V6 and its driving me
crazy. I was convinced (without pulling the codes of corse) that I needed
a new O2 sensor- one of them has 111K on it. Is this not the problem? Id
hate to spend that loot if I dont have to.

 

I forgot to mention, regarding the same problem on my 95 90 2.8L V6, that
the problem does not happen all the time.
Supposing I wake up in the morning and decide to go for a drive. I
start the car, and she runs just fine for about 10-15 minutes, sometimes
more, sometimes less. then it starts.
Lets say while on my drive I decide to go to the store. I painstakingly
make it up the hill, pull in and shut the car off. If Im in the store for a
half hour and return to my car, I start it up, and she runs fine for 5 or
10 minutes, sometime more, sometimes less.
In fact, Yesterday I made a 45 minute drive (highway and city driving)
without a single problem. Unfortunately my my total trip was just over an
hour, and just before the hour mark the problem began again.
PLEASE HELP ME- is this happening to anyone else?
I need to fix it before I go nuts.