This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and therefore not compensated for and can thin the engine out and can then permit the engine to rev happening in the same way as not desired causing harsh running. As its a mechanical oddity it tends not to turn on the aberration roomy and you can sometimes listen a hissing noise like the engine running.
Might after that be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can attain a quick aberration find if you unplug the meter and run the engine without it. if the engine condition is the similar then chances are the meter or the link to it is faulty. Its along with worth cleaning the MAF sensor wires, as they can acquire coated bearing in mind dirt on top of times which next offsets the reading. Use some edit cleaner or brake cleaner to spray onto the wires to surgically remove the dirt on no account adjoin the wires taking into consideration whatever as they are completely fragile
Hello the TPS does have an effect on switching the car into idle mode appropriately I'd recommend to create sure the throttle plate is 100% closed and not slightly stuck next carbon. and then acclimatize the TPS correspondingly that the IDL fasten is continuous to the E2 pin behind the throttle is closed, and retrieve circuit bearing in mind the throttle is just cracked. Don't upset about any voltages, the IDL gate is the truly important one.