[s-cars] Hesitation -- please help

[chris chambers]

Adam,

Keep checking the coil, crank the tester out a little farther and check
each coil again and again until you get spark on 4 but not on one of
them.

Then replace that coil, that's how I determined which coil was bad. 

Now if you crank and lose spark on all 5 at the same time, well either
they are all weak or you have determined it isn't the coil.


HTH
Chris




--- Adam Cramer <crameradam at gmail.com> wrote:

> All-knowing S-car list,
>  Please, please help me figure out what is causing my hesitation
> issues. 
>  I finally got around to testing my coils tonight. I thought this
> would 
> solve my hesitation (under load) issues, but all 5 of my coils seem
> to be 
> fine. I used the adjustable spark gap tester and each of the coils
> made a 
> nice clean, crisp, blue spark about 3/4 - 1 inch long. I couldn't
> find a 
> weak one among them. I really tried to tell myself that the #3 coil
> was bad, 
> but everytime that I would re-test it, the spark would come back nice
> and 
> crisp. ARGH!
>  Symptoms include hesitation under load, especially in the higher
> gears (4th 
> and 5th), although occasionally I will feel the problem in 2nd and
> 3rd. It's 
> not violent jerking like the fuel is being cutoff, but more of just a
> 
> hesitation and general lack of consistent, smooth power to redline. 
> 
> Here's a list of stuff that I have fixed/checked/replaced so far:
> 
> 5 new Spark Plugs (Bosch OEM)
> 2 new POS units
> New Fuel Filter (OEM)
> New Air Filter (OEM)
> Checked for air leaks
> Checked for weak coils
> Checked plug boots (good condition)
> 
> Anyone have any other ideas, either electrical or fuel related? I
> think I've 
> tested all of the electrical options. What about the alternator? Any
> chance 
> a weak alternator would be causing this? I did have an oil leak a few
> months 
> ago that caused oil to accumulate on the alternator. 
>  More background on the car (if it helps you diagnose the
> problem)......RS2 
> turbo, em, maf and injectors. IA chip. Forge BPV (yellow spring).
> Another 
> issue with this car that I haven't been able to solve is that the
> idle RPMs 
> fluctuate when warm. Usually between 800-1000. I doubt this is
> related to 
> the hesitation issue, but I thought I would throw it out there just
> in case.
>  Any help is appreciated.
>  Thanks,
> Adam
> 
> This is definitely a love/hate relationship.
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> 


AUDI - Accelerates Under Demonic Influence.


		
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