d_dibiase at yahoo.com
Thu Nov 3 14:03:40 PDT 2011
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.
'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,
> 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
> 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.
> quattro mailing list
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