My 89 auto SC has problems holding a steady idle and sometimes stalls out when idling while in gear. I recently replaced the plugs and wires and cleaned the throttle body which helped a little, but the problem persists. I have seen many suggestions on this forum ranging from alternator, tps sensor, vacuum leaks, to motor mounts. Problem is I dont want to go bankrupt in the process. How can I verify what is causing my problem or eliminate things that aren't at fault.
Also, my auto trans, in my opinion, shifts way too early under normal driving conditions. For example, it shifts into second almost immediately once the car gets moving. Third gears comes not far behind and overdrive consistently activates at 45 mph (i'm fine with the overdrive, its the 2nd and 3rd gear shift points that are bothering me). Is this normal as it always seems that i'm driving around town in to high of a gear.
Also, my auto trans, in my opinion, shifts way too early under normal driving conditions. For example, it shifts into second almost immediately once the car gets moving. Third gears comes not far behind and overdrive consistently activates at 45 mph (i'm fine with the overdrive, its the 2nd and 3rd gear shift points that are bothering me). Is this normal as it always seems that i'm driving around town in to high of a gear.