Ok I pretty much said it all above. I thought I had a vacumn leak and was spraying the old wd40. My buddy saw what he thought to be something wrong with the TPS cuz the gasket looked off. So he unplugged the TPS and the dam thing idles like a champion! A bit high but it runs great! I went and got my old TPS off my 4.3L and hooked it up and get the same thing. Whats up?
I checked the manuel for the motor it said I should have 5.0 volts on the black and grey wires and I do. It says I need between .2 - 1.0 volt at closed thottle and between 4.0-4.5 at wide open thottle on the black and blue wires. Well Im getting .68 at closed thottle and 4.5 at wide open. What is up?


If anybody can troubleshoot this its you guys!

 

When you disconnect a major sensor the pcm will go into open loop, & substiite a defaulted value for the failed circuit. You are only masking the true problem (rough idle??) by putting pcm in open loop/limp in mode. The tps does not sound as though it is a problem.

 

i think i found the problem. I tried to tap into the coolant temp sensor for my gauge. Well that didnt work and caused the car to go all screwy. I cut it and its back to normal

 

That would be the problem ,1 sensor cant be used for the pcm and the dash.I tried the same thing and the pcm would read 60 degree coolant temp and the dash gauge would be correct.I had to run both coolant temps sensors like they are from the factory.