Check the hose clips for tightness and examine the trunking for any cracks or splits and with all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best way to locate a leak is to have the engine management and hot and next spray can lighter gas /propane or brake cleaner going on for each joint in turn. If the engine rev s occurring you ve found your leak.
Might then be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can reach a quick malfunction locate if you unplug the meter and control the engine without it. if the engine condition is the thesame after that chances are the meter or the connection to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can acquire coated like dirt exceeding time which after that offsets the reading. Use some get into cleaner or brake cleaner to vaporizer onto the wires to separate the dirt upon no account lie alongside the wires bearing in mind anything as they are agreed fragile
I don't have any check engine lights unless I unplug the MAF sensor. subsequent to the MAF is plugged in subsequently the car will stall unless I put my foot on the accelerator. There is plus an intermittent popping strong coming at idle.