88 90q hesitates on accel

[Huw Powell]

> My 88 90q, NG engine w/213k km, has developed a nasty stumble on
> acceleration. You press the accelerator, it feels like usual until you get
> a violent hesitation. After that it's back to normal again. This mostly
> happens at <3k RPM.
>
> Plugs, wires, distributor etc have been verified to be in fine shape. WOT
> switch and idle switch have been respectively fixed and verified OK. Does
> my car have a throttle position sensor which could be FUBAR?

Yes, as prev. posted, you have a potentiometer on the side of the fuel
dist that tracks the air plate.

3 terminals, on side is 5 volts, one is ground.  Either measure the
voltage in the middle the key on, very carefully, or disconnect it and
measure the resistance from the middle  pin to on of the others - it is
very low, I think, just a few ohms from pin 1 to 3 total.

You should see a steady, smooth change over the range while lifting the
air plate.

--
Huw Powell

http://www.humanspeakers.com/

http://www.humanthoughts.org/