1991 Chevy Corsica Engine problems

Hi I'm kinda of new to these new fangled cars so I need some help. I own a 1991 Chevy Corsica and recently replaced the MAP sensor and the O2 sensor. Now the car idles fast and dies when you go around a curve or come to a stop. Any help would be greatly appreciated because I'm on a fixed income and can't take the car to a shop.

Could be a number of problems. Sounds like a vaccuum leak, torn or cracked intake assy (going to your airbox), and possibly your IAC needs cleaned /replaced. Would try cleaning the IAC valve, fixing any and all vaccuum leaks. Be sure the intake is sealed. they won't idle very well if any of these are a problem. Had to get a used intake from a junkyard for my old 91 (3.1) about a year ago. Stalling could be caused by TCC solenoid if you are having these symptoms. The car shudders and shakes when slowing down(like an old standard shift in high gear) and then stalls out. Will start again, but stalls as soon as put in gear. Will work OK when cools down, but then stalls again when warm. If it is just stalling out and restarts OK then my bet is the previous things I mentioned. You might pick up a cheap code tester or see if Advance or Autozone in your area will check for any computer codes. Could be a digital EGR valve but you would get a code indicating that. When you clean the IAC be sure to unhook the battery before doing it, and when starting let it runs for a few minutes to retrain for idle. Have any other problems fixed prior also. Do not give gas when starting, just let it idle.

jsgold thanks for the info but where do i find the TCC solinoid and what is the IAC and where is it? Look forward to your reply and greatful for your help

Really need to know motor size and type of injection (multi port or throttle body) but, if it is a 6 cyl. the TCC solenoid is under your air filter assy. Remove the hoses, filter cover, filter, then remove the #13 bolt at bottom of air filter holder. You will see a 4 pin connector and wire going to your transaxle underneath the filter holder. Unplug it and drive as normal. Will cause you to use a bit more fuel, but if this is the problem it would cost 150-250 bucks to fix and on Corsicas that requires a lot of work. The TCC is cheap but a lot of labor involved would run it to the 150-250 range.
The IAC ( Idle air control) would sit near the entrance of your throttle body and have a small plug/wire running into it. It has a black plastic cap on it and is very easy to spot. Umplug it, remove the two small screws and pull out carefully. If it is caked with carbon clean it with spray type injector cleaner and and paper towels. Clean the area in the throttle body the same way. Do not squeeze this thing, just clean it of all carbon.(has a spring). Put it back in, and let it idle to relearn idle speed. Be sure you have unhooked the battery before removing this also and be sure you have checked for any vacuum line leaks, cracks etc.

Really need to know motor size and type of injection (multi port or throttle body) but, if it is a 6 cyl. the TCC solenoid is under your air filter assy. Remove the hoses, filter cover, filter, then remove the #13 bolt at bottom of air filter holder. You will see a 4 pin connector and wire going to your transaxle underneath the filter holder. Unplug it and drive as normal. Will cause you to use a bit more fuel, but if this is the problem it would cost 150-250 bucks to fix and on Corsicas that requires a lot of work. The TCC is cheap but a lot of labor involved would run it to the 150-250 range.
The IAC ( Idle air control) would sit near the entrance of your throttle body and have a small plug/wire running into it. It has a black plastic cap on it and is very easy to spot. Umplug it, remove the two small screws and pull out carefully. If it is caked with carbon clean it with spray type injector cleaner and and paper towels. Clean the area in the throttle body the same way. Do not squeeze this thing, just clean it of all carbon.(has a spring). Put it back in, and let it idle to relearn idle speed. Be sure you have unhooked the battery before removing this also and be sure you have checked for any vacuum line leaks, cracks etc.
Thanks alot jsgold. Will try these things. Wish me luck!!!!