Ok, I think I have done just about all I know what to do.
Vehicle = 1988 1/2 k1500 shortbed, with a 5.7L TBI, Automatic with OD. It has about 300,000 miles on it but the engine and trans were replaced about two years ago. I LOVE this truck.
Problem= One morning last week it would not start. No Fire at all. I looked into the TBI and it was getting fuel. Pulled a plug- no fire. I then pulled the coil wire and (holy #$%^-
), yes it did have fire. I then replaced the distributor cap, rotor, Plugs (gapped to .040), and plug wires. Still no fire at the plugs. I pulled the ignition module in the distributor and had it tested at AutoZone. out of the four tests, it failed 3 times. I replaced the module and the pickup coil in the distributor. I even replace the main ignition coil just to be safe. Now it started very fine......all until it goes from open loop to closed loop control. It Idles and revs fine until after it warms up....if I put it into gear, it dies. It will stay lit if I power break it. I have check the timing with the (tan/black strip) wire disconnected. Is exacly at 0 degrees. I then replace the ESC module, the TPS sensor, the PCV valve, and the TBI lower gasket. The TPS sensor is reading 0.5V at no throttle. I hear a clicking at the IAC valve.
I still am getting a code-42 from the ECM.
Anyone have a suggestion?
Thanks- Bearcat!
