I just came into possession of two new gizmos for my 83 505 STI:
1) A new thermostat. Car no longer runs cool all the time(!)
2) A digital tachometer (part of a multimeter)
According to the digitial tacho, it's idling ~ 650rpm when warm which isn't good at all. The engine revs fine, but if the throttle is suddenly released the revs drop rapidly, threaten to stall, then return to 650rpm.
The Haynes manual describes a method for setting the mixture on a K-Jetronic for people w/o access to an emissions sensor. Can anyone vouch for this method's effectiveness or should I take it to the professionals? (Budget alert: I'm a uni student!)
I have a niggling feeling that while it may be bad now, adjusting it may make it worse .
Also, the timing is slightly retarded. Will this effect idle or just power?
Oh, and I've found the mixture screw (it's under the conical tube-like cover, in front of the airflow meter, right?) but I can't find the idle screw - where is it?
For the record, the extra air device works properly and so does the cold start injector.
1) A new thermostat. Car no longer runs cool all the time(!)
2) A digital tachometer (part of a multimeter)
According to the digitial tacho, it's idling ~ 650rpm when warm which isn't good at all. The engine revs fine, but if the throttle is suddenly released the revs drop rapidly, threaten to stall, then return to 650rpm.
The Haynes manual describes a method for setting the mixture on a K-Jetronic for people w/o access to an emissions sensor. Can anyone vouch for this method's effectiveness or should I take it to the professionals? (Budget alert: I'm a uni student!)
I have a niggling feeling that while it may be bad now, adjusting it may make it worse .
Also, the timing is slightly retarded. Will this effect idle or just power?
Oh, and I've found the mixture screw (it's under the conical tube-like cover, in front of the airflow meter, right?) but I can't find the idle screw - where is it?
For the record, the extra air device works properly and so does the cold start injector.