88 90q on the fritz

[Jim Green]

--- WAUFX at aol.com wrote:
> Fabulous listers-
>
> My 88 90q is running poorly. It is ragged on
> acceleration, and not accelerating as rapidly as
> usual. It's doing the same thing my 87 4kq did
> before the fuel dist. seized.
>
> When the accelerator is depressed very slightly
> (like the amount to cruise on a flat road, very
> little) car will run fine. But push it down even the
> amount required for any acceleration whatsoever, and
> the symptoms will appear. Car has been sitting for 3
> weeks with 1/3 tank gas. I filled it up with 93, as
> usual, with no change.
>
> When I got the car in July 2001 it ran like this.
> Replacing the plugs, cap, rotor, and fuel pump relay
> cured its poor running/stalling problems. The car
> has not done this since before except for almost
> every time I do one rev-through (1-4k rpms) in
> normal driving, there would be a slight hesitation,
> like it was clearing its throat or something at
> around 2k, then full power.
>
> Now it does it full time. Trip computer is reading
> 19 mpg, slightly less than its usual slightly
> inaccurate 21.
>
> I already unplugged o2 sensor and ISV, with no
> change. Checked air flow plate, and that is moving
> freely. Also checked #2's spark plug, no black
> deposits. Sniffed plug, no gas smell.
>
> Now that I think of it....it has been around 12K
> since cap, rotor, and plugs were done...hmm.. : )
> And plug wires have never been replaced in my
> ownership.
>
> But would the fact that these items are nearing the
> end of thier useful life account for the sudden
> appearance of this poor-running problem?
>
> Should I go plugs, wires, cap and rotor and then go
> from there if the problem is still present?
>
> Advice, heckling, BTDT, jokes, all welcome.
>
> Megan

Yikes, check your timing belt to see if it has
skipped, sounds like what mine did before it self
destructed a few years ago.  I was changing fuel
filters, injectors, plugs, wires, caps, then it
snapped for good and I new right away why it was
running bad.

=====
Jim Green
'89 90tq EFI
http://www.geocities.com/jeg1976/car_home.html

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