Check the hose clips for tightness and examine the trunking for any cracks or splits and next every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best artifice to find a leak is to have the engine executive and hot and subsequently spray can lighter gas /propane or brake cleaner vis--vis each joint in turn. If the engine rev s taking place you ve found your leak.
Its then worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will every result in insufficient fuel visceral delivered to the engine. Might moreover be worth cleaning out the idle eagerness govern motor / valve as these get clogged occurring past carbon and some brake cleaner washed through helps pardon things off.
I don't have any check engine lights unless I unplug the MAF sensor. later than the MAF is plugged in then the car will stall unless I put my foot upon the accelerator. There is plus an intermittent popping unassailable coming at idle.