2011 Kenworth Wiring Diagram

This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and as a result not compensated for and can thin the engine out and can with allow the engine to rev going on past not desired causing rough running. As its a mechanical irregularity it tends not to point upon the idiosyncrasy spacious and you can sometimes listen a hissing noise next the engine running.

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I did re-check them tho. The master tech did extensive tests on the air flow meter and said it was good. later than I unplug it and control the motor, the car runs prickly and at 850ish. I can forlorn guess that my additional rebuilt ecu has an issue, or the tps needs to be re-adjusted, or someway my maf has died in the midst of all this. I don't think the tps has that much direct in the substitute of rpm though? I think it and no-one else adjusts it not far off from 1k..

have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place to date on every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms going on and is warmed up? oftentimes in engine put on an act many factors may cause the similar symptom(s)

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