A vacuum leak maybe? An opening in the induction system somewhere past
the AFM allowing un-metered air in?
Paul Parkanzky
On Mar 11, 2005, at 11:39 AM, Matt Trebelhorn wrote:
> It's a reasonably good car, but I'm looking for some advice because it
> hesitates or stutters at times -- mostly noticeable at low speed and
> low throttle openings, when it drops in to top gear. It will stutter
> a little if I don't press on the gas enough to kick down a cog.
>
> Anyway, I don't even know if this is a motor problem or a transmission
> problem. It isn't temp dependent (car temp or ambient) as far as I
> can tell, except that when the car is really cold (below freezing,
> the first half-mile or so from a cold start) it won't shift in to top
> gear. But the stutter can still happen in those circumstances, just
> not in top gear.
>
> I can think of a few dozen things it might be, but I would just be
> taking a shot in the dark. Any number of sensors in the FI loop, some
> of the voodoo inside the transmission, maybe even something as simple
> as a cable adjustment. But I have no idea where to begin. The haynes
> manual isn't particularly helpful, as far as I can tell. I've sprayed
> some carb/injector cleaner stuff on the throttle body, and I gave it a
> basic tuneup over a year ago (k/n af, fuel filter,
> cap/rotor/plugs/wires.) It has 240,000 miles on it.
>
> Any ideas/suggestions? Thanks,
> M.
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