when i try to turn on my car it doesnt start or crank. If i keeping messing with the terminals after about the 5th time of taking the negative cable off and putting it back on the car cranks and turns on but once that happens I have to keep pressing the gas or else the car will die. After this happens my cars idle is horrible and the rps jerk back and forth quickly. No check engine codes. I've had suggestions on replacing the iac valve but I havent got to it yet. With these symptoms what does everyone suggests doing?
99 grand prix gtp