Tried the "paperclip diagnose trick" again, and it shows code 42.
I also tested the TPS with a voltmeter at it's at 0,63v at idle and 4,5v at wide open throttle, so i guess that TPS is ok.
Hello. I have a problem with my truck. It's a 1988 C1500 with a 350 tbi and th700r4.
The truck works fine when cold, but after driving a while and engine is hot the problem starts.
It seems like rpm is too low at idle and when i step off the gas pedal when driving. And voltmeter drops down...