Adjust idle on 1993 Saturn sl1?
The idle is controls ONLY by the PCM. Replace your ECTS along with cleaning the Idle Air Control valve located on the throttle body.
How do you increase the RPM from 650 to 750 when in park for a 1997 Saturn SL1 with automatic transmission as it doesn't idle smooth at 650 rpm?
My son's 1999 Salvaged/total Saturn SL1 was rebuilt using many engine and body parts from 1995-1999 Saturn SL1 and SL2 cars, I believe it will work fine. I do not recommend before 1995 or 2000 or later models. I do not recommend SL2 either. I am not the expert but most of my son's engine is not 1999 SL1. Good luck!