Check the hose clips for tightness and inspect the trunking for any cracks or splits and moreover every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best quirk to locate a leak is to have the engine paperwork and warm and later spray lighter gas /propane or brake cleaner almost each joint in turn. If the engine rev s going on you ve found your leak.
Might moreover be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a fast deformity find if you unplug the meter and manage the engine without it. if the engine condition is the thesame next 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 similar to dirt over get older which subsequently offsets the reading. Use some way in cleaner or brake cleaner to spray onto the wires to sever the dirt on no account touch the wires as soon as everything as they are enormously fragile
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