Check the hose clips for tightness and examine the trunking for any cracks or splits and plus every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best pretension to locate a leak is to have the engine doling out and hot and next 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 also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can accomplish a fast idiosyncrasy locate if you unplug the meter and rule the engine without it. if the engine condition is the similar then chances are the meter or the attachment to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can acquire coated once dirt more than era which later offsets the reading. Use some get into cleaner or brake cleaner to vaporizer onto the wires to surgically remove the dirt upon no account adjoin the wires with whatever as they are enormously fragile
I don't have any check engine lights unless I unplug the MAF sensor. like the MAF is plugged in next the car will stall unless I put my foot upon the accelerator. There is afterward an intermittent popping hermetic coming at idle.