This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and therefore not compensated for and can lean the engine out and can next allow the engine to rev in the works later not desired causing severe running. As its a mechanical anomaly it tends not to perspective on the malformation blithe and you can sometimes listen a hissing noise in the manner of the engine running.
Might as a consequence be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a fast malfunction locate if you unplug the meter and direct the engine without it. if the engine condition is the similar later chances are the meter or the membership to it is faulty. Its as well as worth cleaning the MAF sensor wires, as they can get coated afterward dirt more than get older which next offsets the reading. Use some contact cleaner or brake cleaner to spray can onto the wires to remove the dirt on no account be adjacent to the wires behind everything as they are utterly fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you happening 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 up and is warmed up? oftentimes in engine fake many factors may cause the thesame symptom(s)
Photo Schematics for 2008 chevy radio wiring diagram
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