Why 92 Saturn stalls only sometimes when stopped Otherwise what controls the idle speed and can you fix this myself?
It could be a number of things wrong with it. The problem you are having sounds similar to what my car was doing. There is an idle air control valve located on your throttle body which can collect carbon deposits. It may be helpful to take it off and spray it with carb cleaner. The EGR valve (Exhaust Gas Recirculation) was getting stuck on my car because of carbon deposits. I took it off and let it soak overnight in carb cleaner. It won't hurt to try cleaning those two parts. If that doesn't work, you can buy a GM code reader to read your computer and it will tell you what is wrong with it. (I bought one off of eBay for $25 after shipping) Also, I would recommend buying a repair manual from an auto parts store. It is pretty good about giving you step by step instructions on how to repair your car. I hope this helps.