Check the hose clips for tightness and inspect the trunking for any cracks or splits and along with all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best quirk to locate a leak is to have the engine executive and hot and then spray can lighter gas /propane or brake cleaner re each joint in turn. If the engine rev s happening 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 accomplish a quick deformity find if you unplug the meter and rule the engine without it. if the engine condition is the thesame after that chances are the meter or the link to it is faulty. Its along with worth cleaning the MAF sensor wires, as they can get coated like dirt higher than times which then offsets the reading. Use some gate cleaner or brake cleaner to spray can onto the wires to remove the dirt upon no account touch the wires later all as they are enormously 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 after that an intermittent popping unassailable coming at idle.