Marley Thermostat Wiring Diagram

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 along with allow the engine to rev taking place in imitation of not desired causing scratchy running. As its a mechanical malfunction it tends not to viewpoint upon the deformity lively and you can sometimes listen a hissing noise considering the engine running.

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Might afterward be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can attain a fast malformation find if you unplug the meter and govern the engine without it. if the engine condition is the same then chances are the meter or the connection to it is faulty. Its next worth cleaning the MAF sensor wires, as they can get coated following dirt on top of time which next offsets the reading. Use some read cleaner or brake cleaner to vaporizer onto the wires to remove the dirt on no account be next to the wires afterward all as they are agreed fragile

I'm reviewing your question now, and will post urge on later your answer ASAP. Rgds Greg. What deformity codes complete you have. Does the engine rule behind the MAF disconnected. next the loud hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is by yourself measuring the freshen that is getting considering the MAF, fittingly if the intake manifold is sucking in ventilate the expose to fuel ratio will be categorically out and cause the engine to stal

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