[BiturboS4] RE: more hesitation... after a cold start..
nick at mistry.com
Wed Jun 4 04:57:32 EDT 2003
Since i do not have VAG-COM yet (silly of me, i know!!) i dont know if my
car is throwing any codes. But after talking to several mechanic
friends they suspect the MAF sensor. When the car hesistates it
definitely feels like the computer trying to compensate for something...
problem is, trying to find out what!!
The other thing i originally suspected was the ESP / traction control
kicking in due to a bad sensor reading. Or even a bug in the ESP system.
I have yet to notice the ESP light go on the dash when the car hesitates,
so im still thinking its a longshot for this idea. Anyone w/o ESP have
> Only problem is...
> I don't know which of the parts they replaced actually
> fixed the hesitation problem!
> But they did say the codes stopped after replacing the
> throttle body (not the boot, the throttle body itself). As
> I remember, the MAF was giving bad (low) readings,
> which caused the ECU to lean out the mixture, which
> caused the engine to knock, which caused the ECU
> to back off the timing - which could lead to hesitation?
> I just threw it out as a possibility, but maybe it will solve
> some of the problems you've all been experiencing.
> ----- Original Message -----
> From: "David Lau" <toomanycars at mac.com>
> To: "Bill Coleman" <billc at usnr.com>; <biturbos4 at audifans.com>
> Sent: Tuesday, June 03, 2003 3:04 PM
> Subject: Re: [BiturboS4] RE: more hesitation... after a cold start..
>> I'll be on my way to Howard Cooper with a printout of your email in hand
>> David J. Lau, The Brookwood Studio, Inc. David at brookwoodstudio.com
>> 734-994-4992 734-994-1210(fax) www.brookwoodstudio.com
>> The experienced professionals in studio and location fine arts
>> "helping musicians sound better than they ever thought possible"
>> From: "Bill Coleman" <billc at usnr.com>
>> Date: Tue, 3 Jun 2003 12:36:41 -0400
>> To: <biturbos4 at audifans.com>
>> Subject: [BiturboS4] RE: more hesitation... after a cold start..
>> It's a long shot, but you could have them try swapping the
>> mass air flow sensor. After Howard Cooper replaced the
>> throttle body (among other things) on my S4 it stopped
>> throwing codes, but it still wasn't running quite right. Then
>> they tried the MAF and since then it's better than it's ever
>> been, including the cold start hesitation that I used to have.
>> 00 S4 6p
>> 01 A4 Avant 1.8tq 5sp
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