Hello I’m trying to help my friend out with his car. It is a 1992 c4. When you first start the car the idle jumps and car stalls. You can actually feel the gas pedal moving up and down. I have to hold the the idle at 1500rpm so it doesn’t stall. After about 30 seconds the car runs great. I jumped the codes and c32,34,36,38, H27,32,34,36 and 38. His negative terminal was stripped so the car would start when it wanted. I’m assuming that’s why there were so many codes.I changed the terminals and cleared the codes. Tomorrow I am going to take it on a ride and see if I have any codes. Does anyone have any ideas why the idle fluctuates like that. Thank you for any help.