Check the hose clips for tightness and examine the trunking for any cracks or splits and plus all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best showing off to locate a leak is to have the engine management and hot and later spray lighter gas /propane or brake cleaner a propos each joint in turn. If the engine rev s in the works you ve found your leak.
Its after that worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a sick pump will every outcome in insufficient fuel instinctive delivered to the engine. Might with be worth cleaning out the idle promptness run motor / valve as these acquire clogged happening taking into consideration carbon and some brake cleaner washed through helps clear things off.
I don't have any check engine lights unless I unplug the MAF sensor. as soon as the MAF is plugged in later the car will stall unless I put my foot upon the accelerator. There is in addition to an intermittent popping unquestionable coming at idle.