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Tech Tips, Tech Questions / Re: IAC control input
« on: March 10, 2025, 08:11:33 am »
You guys know so much anything I throw out there would be a wild guess. That said, the worst running situation with a fluctuating idle where I had to hold down the accelerator to make it run/start at all was when the coolant temperature sensor went bad. Apparently it was telling the ECM it was -40*F outside and dumping in tons of fuel. Scott helped me diagnose it after I messed with the IAC/distributor/TPS trying to figure it out on my own.