Check the hose clips for tightness and inspect the trunking for any cracks or splits and then all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best exaggeration to locate a leak is to have the engine organization and warm and next vaporizer lighter gas /propane or brake cleaner roughly each joint in turn. If the engine rev s going on you ve found your leak.
Might with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick deviation locate if you unplug the meter and control the engine without it. if the engine condition is the similar subsequently chances are the meter or the membership to it is faulty. Its next worth cleaning the MAF sensor wires, as they can acquire coated subsequently dirt beyond era which then offsets the reading. Use some gain access to cleaner or brake cleaner to vaporizer onto the wires to cut off the dirt upon no account be adjacent to the wires next whatever as they are enormously fragile
I don't have any check engine lights unless I unplug the MAF sensor. gone the MAF is plugged in then the car will stall unless I put my foot on the accelerator. There is along with an intermittent popping sealed coming at idle.