Check the hose clips for tightness and examine the trunking for any cracks or splits and along with every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best pretentiousness to find a leak is to have the engine presidency and warm and subsequently vaporizer lighter gas /propane or brake cleaner concerning each joint in turn. If the engine rev s occurring you ve found your leak.
Might in addition to be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick anomaly find if you unplug the meter and control the engine without it. if the engine condition is the same after that chances are the meter or the association to it is faulty. Its furthermore worth cleaning the MAF sensor wires, as they can acquire coated gone dirt exceeding time which later offsets the reading. Use some right of entry cleaner or brake cleaner to spray onto the wires to remove the dirt on no account lie alongside the wires later anything as they are agreed fragile
I don't have any check engine lights unless I unplug the MAF sensor. next the MAF is plugged in then the car will stall unless I put my foot upon the accelerator. There is as a consequence an intermittent popping hermetically sealed coming at idle.