Help!!! Truck bogging

[John.nails]

My truck bogs down when at idle and hisses until it eventually dies. And then revs up and stays at 1700rpms while sitting at a red light. And sometimes dies while turning. Figured it was a sensor issue and have changed the TPS, IAC, and, due to my mechanics suggestion, taken apart the intake manifold, replaced all gaskets, decarbonized and then reassembled. Still running like ****. It's to the point where I have no choice but to sell it. I've changed out the downstream O2 sensor, and switched out the ECM. My mechanic has gone through the vehicle and says that there are no bad grounds and its not an electrical problem. He's also changed out the crank sensor. Any suggestions?

 

[crazzywolfie]

have you cleaned the throttle body?

 

[John.nails]

Yep. My mechanic did it while he was dealing with the intake
Manifold

 

[crazzywolfie]

have you checked the computer for codes?

 

[dodge dude94]

Sounds like the mechanic may have *****'d the IAC valve.

 

[John.nails]

No check engine light and no codes.

 

[Johnn123]

Check the IAC valve in the throttle body, make sure its clean, and not bent anywhere, and the wiring is all good. Catalytic convertor good to? Can try pullin front o2 and running with it out of the exhaust **** (please disconnect when doing so).