I'm pulling my hair out and don't have a lot to spare! Been all over the s10, truck, 3rd gen sites and not getting anywhere. 1992 gmc Sonoma 2wd 4.3 Tbi z motor. Has newer plugs, wires, cap, rotor, coil , temp sensor. I've checked the egr, tested the tps, it has a new icm. It will start and idle...