Loss of Power, backfiring - 1991 90 20vq sedan

[Brendan]

New fuel pump, forgot to put that in.
And a fuel pump as the cause, I would imagine, would be with or without it 
being in gear.

On Sunday 13 July 2008, you wrote:
> Tired fuel pump?
> ----- Original Message -----
> From: "Brendan" <mailinglist at endosquid.com>
> To: <quattro at audifans.com>
> Sent: Sunday, July 13, 2008 10:22 PM
> Subject: Loss of Power, backfiring - 1991 90 20vq sedan
>
> > Ok, I made it a few years without wasting bandwidth, so here goes:
> >
> > --- *Only* when in gear in driving ---
> > No matter what gear (but feels different in each gear), car will hit an
> > odd
> > powerloss between 3400/3600 RPMs if accelerated slowly through that band.
> > If
> > you rocket through, there is nearly no powerloss. This powerloss keeps
> > going
> > unless you downshift and/or somehow accelerate quickly over 4200 RPMs or
> > so
> > at which point, you feel the car drop out of wimpy and back into Hefty.
> > If you stay driving in what I think of as "power loss mode", the car will
> > backfire eventually.
> >
> > Been happening for years, but I have adjusted my manner of driving to
> > compensate, namely, I just speed all of the time.
> >
> > New parts since problem began:
> > timing belt, water pump, tensioner
> > plugs, cap, rotor, wires, air fuel filters
> > wheels, tranny/diff mounts
> > entire suspension
> > exhaust, o2 sensor, cat
> > shifter
> > MAF was gently washed with alcohol until clean, but not replaced
> >
> > Ideas? My mechanic and I are nearly out of them.
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