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I have a 1990 Chevy Lumina with a 3.1L Auto Trans. Just replaced the crank sensor 2 months ago, rewired and rerouted the wires from that to the ICM, then had to replace the ICM last month. Now the car won't idle. My friend (a mechanical with all the cool tools) said the Fuel Injector Pressure regulator also needed to be replaced. When the car is warm, it will start and die 2 or 3 times before running. Could the problem gotten worse? Or is this an IAC or TPS issue?