This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and consequently not compensated for and can lean the engine out and can in addition to allow the engine to rev happening gone not desired causing harsh running. As its a mechanical idiosyncrasy it tends not to turn upon the defect lively and you can sometimes listen a hissing noise in the manner of the engine running.
Might plus be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a fast deviation find if you unplug the meter and rule the engine without it. if the engine condition is the thesame next chances are the meter or the relationship to it is faulty. Its with worth cleaning the MAF sensor wires, as they can acquire coated as soon as dirt greater than mature which next offsets the reading. Use some retrieve cleaner or brake cleaner to vaporizer onto the wires to remove the dirt upon no account adjoin the wires in the same way as anything as they are categorically fragile
Hello the TPS does have an effect upon switching the car into idle mode for that reason I'd suggest to create definite the throttle dish is 100% closed and not slightly grounded in imitation of carbon. and subsequently adjust the TPS so that the IDL fix is continuous to the E2 pin with the throttle is closed, and edit circuit in imitation of the throttle is just cracked. Don't bother more or less any voltages, the IDL read is the truly important one.