Stumble

[Dan DiBiase]

I can certainly have it checked, but since it isn't really intermittent, I would think that the light would be triggered. It does it
all the time, at the rev range I mentioned. It's just not a big stumble. Drove the car 450 miles Tues-Weds with no issues.
I've replaced the coil packs in the past, and this doesn't have the same feel as when they went individually. Drive-ability was
dramatically impacted when even one of the CP's went bad.

Dan D
'04 A4 1.8Tq MT-6
Central NJ USA



________________________________
From: Huw Powell <audi at humanspeakers.com>
To: Hayes Myers <hayesmyers at gmail.com>
Cc: Dan DiBiase <d_dibiase at yahoo.com>; "quattro at audifans.com" <quattro at audifans.com>
Sent: Thursday, November 3, 2011 4:45 PM
Subject: Re: Stumble

The ECU can store codes without turning on the MIL.  For instance,a 
single misfire will be "reported", but won't trigger the MIL.

On 11/3/2011 4:16 PM, Hayes Myers wrote:
> I mentioned coils to Dan...but you would normally see the CEL so might
> not be the case....could be that over time the failure is more
> noticeable and the coils then could throw the CEL?
>
> not sure,
> Hayes
>
> On Thu, Nov 3, 2011 at 3:50 PM, Huw Powell <audi at humanspeakers.com
> <mailto:audi at humanspeakers.com>> wrote:
>
>
>
>     On 11/3/2011 3:17 PM, Dan DiBiase wrote:
>
>         I've noticed a slight stumble during acceleration in my car over
>         the past week or so. Basically, in most gears, when the car is
>         warmed up, there is a slight hesitation or stumble while
>         accelerating - it always occurs around 2,000 - 2,300 rpm,
>         regardless of
>         which gear I am in. It feels like an interruption in the engine
>         power, or a hesitation. No CELs have come on, and the TB was
>         replaced
>         at 75k miles (currently have 109k). Any thoughts on what could
>         cause this stumble?
>
>
>     I don't really have any ideas, but you should have someone check to
>     see if there any "history codes" stored in the ECU.
>
>     Huw
>
>     _________________________________________________
>     quattro mailing list
>     http://www.audifans.com/__mailman/listinfo/quattro
>     <http://www.audifans.com/mailman/listinfo/quattro>
>     http://www.audifans.com/kb/__List_information
>     <http://www.audifans.com/kb/List_information>
>
>
> No virus found in this message.
> Checked by AVG - www.avg.com <http://www.avg.com>
> Version: 2012.0.1834 / Virus Database: 2092/4592 - Release Date: 11/02/11
>
> --14dae93409b731a82204b0da45c6--