After the car warms up, the idle speed (which used to be correctly at 850rpm), is now at 1250. I adjusted it down and the idle adjust screw hits the hard stop when it is only at 950-1000 and won't go any lower.
I checked the fault codes, and it is throwing a 14 - atmospheric pressure sensor. I doubt this is related, but have no idea.
Car #: 86
Year : 1990 Posts: 135
I can't get mine below about 1050 RPM either. I bottom out the air screw, cleaned the TB numerous times, adjusted all the preload out of the linkage, and thats just where it sets. If I run stock timing, it idles correctly.
I've just accepted that thats the way its gonna be.
Car #: 94
Year : 90 Posts: 1319
vacuum leak. I had one that came from a cracked injector o-ring. Took forever to find. Also look at the crossover tube for the intake. They can rub on the pulley and get a small hole in the back that is almost impossible to see.