mhariush

I have a 87 944 S that has a little issue. I just got it running after a rebuild, and after the ICU and Computer died after a stuck starter motor.

The car idles fine (could be tuned slightly smoother) and drives fine, except when I slow down to an almost or compete stop. The car almost chokes (and sometimes do), the tac drops down to the bottom and the car looses all power.
It happens when I slow down fast from driving speed, like when I slow down to go into a parking lot, slow down to a red light or when traffic is backed up.

Anyone know what the issue could be here? I'm thinking something with the throttle but I'm no expert.

thanks

dillon410021

I think it may be the isv. mine would almost stall a lot

SID443

Where does it idle at?if it is at exactly 1000 kick it up a notch

V2Rocket

Sorry I didn't return your call - busy day yesterday.

Check the throttle position sensor - if the "idle" contact is worn out then it will try to run based on AFM signal, with a closed throttle plate, rather than on the idle fuel map.

Alternatively, there may be a throttle-stop screw on the throttle body - as its name suggests, you can adjust its length for the throttle cam to stop at a certain point. If it is too far shut then you simply may not be getting enough air into the motor at idle.

mhariush

Had the car at a shop to install a new ac compressor and fix oil cooler housing leak that I did not want to do on my own, that is a lot of work! Turns out the throttle is dirty from standing too long and this will solve the problem.