[BiturboS4] RE: more hesitation... after a cold start..

Bill Coleman billc at usnr.com
Tue Jun 3 16:27:38 EDT 2003

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
> soon.
> David
> --
> 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 recording,
> "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.
> Bill
> 00 S4 6p
> 01 A4 Avant 1.8tq 5sp
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