So my 91 GT has been having some idling issues lately. Whenever I start the car it either stalls straight away if I dont step on the gas right away, or the RPMs will just jump around and it will not stay steady, and the eventually stall out. This past summer I took it on a pretty far road trip ( From NY to VA and back ) and ever since then this problem has been happening. I have tried just about everything you can think of. I replaced the IAC, adjusted the TPS, cleaned the MAF, I even tried flushing the the fuel system and nothing works at all. Also when the car is idling the battery level meter in the car goes up and down as well... Maybe that is the problem? I really want to get this fixed ASAP so any help would be greatly appreciated.