[s-cars] miss at idle

[Matthew Russell]

Oh, absolutely.  I don't want to be in here again until something  
FAILS.  I plan on cleaning up the wiring while I'm in there.  Now with  
the car back home I can take the whole assembly off and get the  
multimeter out to closely check all the wiring as see exactly what  
failed.

I did notice the wires entering coil #2 right at the bend being VERY  
stiff, so I'm thinking it might be this or internal, or further up the  
line.  We'll see.

-Matt

On Nov 17, 2008, at 9:43 PM, Calvin Craig wrote:

> Good to hear you got it cranked and home, Matt, and in the meantime
> definitized the diagnosis.
> --Calvin
>
>
> -----Original Message-----
> From: Matthew Russell [mailto:skippertgore at gmail.com]
> Sent: Monday, November 17, 2008 8:55 PM
> To: audi list
> Cc: Steve Young; David Forgie; Robert Myers; JC; Paul Gailus; Calvin
> Craig
> Subject: Re: [s-cars] miss at idle
>
>
> Hi guys- Update #4... (longish)
>
> Had some good emails off list with Paul Gailus... between that and the
> info y'all have shared previously, I limped the car home today on 4
> cyls where it now sits in the garage waiting for parts. I wanted to
> detail this for the next person and general sharing of knowledge.
>
> Paul and I speculated that the CPS failing didn't make sense symptom-
> wise with what the car was doing when it wouldn't restart after the
> initial diagnosis of a bad #2 coil.  He thought that perhaps the ECM
> was still trying to fire the #2 coil and if it was worsening, or had
> an internal short or short to ground through bad wiring - that a
> breaker somewhere was getting tripped.  thus, the car would idle for
> those few seconds, die... and then not immediately restart until the
> breaker reset itself.  It just decided to up and die when I was
> driving it when I shouldn't have been...
>
> So after checking fuel pressure today, I disconnected the voltage
> supply from the ECM (one of the 2 white (?) connectors on the firewall
> and checked for resistance to ground.  Some continuity was present
> where it should have been OL on the coil #2 lead.  So I disconnected
> the supply lead from the connector and taped it up out of the way.
> The car fired up, still running on 4, but running... and I was able to
> nurse it back.
>
> Good things to share.  Thank you Paul, Steve, Dave, Bob, JC and Calvin
> for your ideas and help.  I hope this info will also help someone else
> down the road. I learned a bunch.  Will be back on the road by the end
> of the week.
>
> Till then, it's the wife's 1998 V70. nice car, but man... not an audi.
> Boy do they squeak and rattle something fierce.
> 8-)
>
> -Matt, CO
> 92  s4
>
>
>
> On Nov 15, 2008, at 9:22 PM, I wrote:
>
>> Hey- Update #3...
>>
>> well, she now sits in a parking lot about 3 miles from home.
>> I was gently driving home after what I hoped had been productive as
>> far as figuring out this issue and 10 minutes down the road, tach
>> went to 0, oil light flashed, and engine stalled.  Yikes.
>>
>> checked oil (full) and attempted restart.  Turns over more times
>> then normal, no catch.  let it sit for a minute while i pulled
>> codes, only found one for 2212 Throttle Potentiometer which I'm not
>> convinced i read correctly.  I need to recheck tomorrow.
>> Attempted restart, engine caught and idled for 15-20 seconds? then
>> died again. Hmmm.  This seems different than the first issue of a
>> coil going out.
>>
>> So i'm thinking new problem in addition to original? or related?  I
>> need to recheck for spark and fuel in the morning and see if
>> anything else has changed, as well as blink out any codes.
>>
>> Oh, and I had a bottle of cold water with me, so i poured it down
>> near the cam pulley in case the CPS is on the way out, and i thought
>> maybe that (the water) made a difference, but now i'm not so
>> convinced.  As I Tried the car 6 hours later after work, it's 35
>> degrees out and symptom is the same.  Turns over, coughs and idles
>> for 15-20 seconds and dies.
>>
>> This one could be a doozy.
>>
>> -Matt, CO
>> busted s4
>>
>>>
>