Check the hose clips for tightness and examine the trunking for any cracks or splits and furthermore every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best pretension to locate a leak is to have the engine running and warm and after that spray lighter gas /propane or brake cleaner approximately each joint in turn. If the engine rev s happening you ve found your leak.
Might after that be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can accomplish a quick deviation locate if you unplug the meter and govern the engine without it. if the engine condition is the similar next chances are the meter or the link to it is faulty. Its plus worth cleaning the MAF sensor wires, as they can get coated like dirt higher than times which later offsets the reading. Use some entrance cleaner or brake cleaner to vaporizer onto the wires to cut off the dirt on no account touch the wires past all as they are utterly fragile
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