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hello Mike, the first thing i did was check for a vacuume leak and found that the throttle body gasket was leaking and i replaced it,and yes i checked for dtc's the only one was rpm's to high, there is no vacuum leaks now something is triggering the idle air control to open up if you turn off the key real quick while driving and turn it back on the issue is gone the same as removing the wire off the idle air control unit,there is no binding of the of the throttle plates if there was the rpm's would not go down when removing the iac wire
coolant temp sensor reading coolant temp within specs, there is no vacuum leaks, short fuel trim 1-2 engine idles beautifull, no black smoke,
no rough idle, like i said something is trigging the iac solenoid to engage.
if that was was the case thetruck would be running richtheat not the case.
is there any thing that would cause the ecu to command the iac solenoid to energize?
mike most of the problems you talk about would be there all the time, like i said something is trigging the ecu or computer to energize iac solenoid,
redid koeo test and koer test with no dtc's the problem even happened while the test was going on, the rpm's were going north of 3000rpm's had to remove the wire going to iac solenoid.
it does it when it wants to hot-cold don't make a difference
checked all vacuum connections coming off the intake manifold, there again it should do it all the time, right now if i go and start that truck you would not know that it had a problem, drive it and it might act up and it might not.
sorry Mike i tried all that, look don't feel bad i ran out of ideas too thats why i called you guys, i hoped you could tell me something i did'ent know
THANKS FOR TRYING, JUST TOOK THE TRUCK OUT AND COULD NOT RUN ANY BETTER, I DONT UNDERSTAND ETHER.