350z High and Erratic Idle

2007 350z High and Erratic Idle

Hi Scotty, 2007 350z Roadster, HR engine. Performed spark plug replace, MAF sensor clean, throttle body clean. Disconnected negative battery terminal before throttle body clean, however, rotated butterflies (there are two on this engine) while sensor wires still connected. Results in consistently high and erratic (searching) idle behavior. Performed all accelerator and throttle position relearn procedures numerous times, no results. Apparently, this is a known issue on this vehicle. Something to do with the throttle bodies while electrically connected to the ECM, whether powered or not, can corrupt memory if the butterflies are moved. Should I go to dealer service and have the engine control module re-flashed? Thanks for your advice.

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Zcarcrazy
Zcarcrazy

Thank you. Is there a particular reason that the sensors in these throttle bodies go bad? I would assume they are simple linear resistors. Are they more sophisticated than that?

ScottyKilmer
ScottyKilmer

Editor

yes, I would start there and realize you may need a new throttle body too

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