Fastbull
SCCoA Member
1990 SC Has extremley rough idle and stalls after about 30 seconds if you dont give it some throttle. It has a slight miss all the way though 2k rpm then runs fine. Runs extremely strong at WOT and makes full boost and is getting around 20 vac so no vac leak. It idled fine last week then I had it apart to change the water pump and now it runs like crap. Today I checked the codes and got 41-Oxygen sensor circuit indicates system lean, right side and 91-Oxygen sensor indicates system lean, left side. Anyone have any ideas? Thanks.