Check the hose clips for tightness and inspect the trunking for any cracks or splits and afterward all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best showing off to find a leak is to have the engine admin and hot and subsequently spray can lighter gas /propane or brake cleaner almost each joint in turn. If the engine rev s in the works you ve found your leak.
Might along with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can reach a fast malfunction find if you unplug the meter and run the engine without it. if the engine condition is the thesame then chances are the meter or the connection to it is faulty. Its with worth cleaning the MAF sensor wires, as they can get coated in imitation of dirt greater than time which subsequently offsets the reading. Use some open cleaner or brake cleaner to spray onto the wires to sever the dirt on no account be adjacent to the wires following anything as they are agreed fragile
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