Stumble

[Hayes Myers]

Have you done your coolant manifold etc/ (backside?) all seem to require
replacing at some point.

cheers

On Mon, Jan 9, 2012 at 4:16 PM, Dan DiBiase <d_dibiase at yahoo.com> wrote:

>
>
> On 11/3/11, Dan DiBiase <d_dibiase at yahoo.com> 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?
>
>
> Ok, I finally got around to doing some additional diagnostic work. None of
> the local auto places will pull codes
> without a CEL, and when I loosened my gas cap to try and generate one, it
> never came on! Since several suggested
> the MAF sensor (and Google suggested same) I disconnected the wires and
> drove a bit and it seemed to drive a lot
> better. So I ordered one from Chris at Force5 and replaced it last Friday.
> Car DOES run better but still a little
> 'stumbly' although not as definitively (i.e., not always at the same rpm
> level as before).
>
> So Sunday I was leaving to drive an hour and a half for a Christmas lunch
> with my family and the CEL came on a
> mile from my house. Went back and we took the Odyssey instead. Today I
> went to Autozone and they pulled up a
> P0118 - Engine Coolant Temperature circuit fault. Googling indicates that
> it is the G62 coolant sensor at the
> back of the had. So guess I will pick one up and replace it. I also read
> somewhere that it could cause a stumbling
> condition, so perhaps that is the true culprit here.
>
> Dan D
> '04 A4 1.8Tq MT-6
> Central NJ USA
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