Check the hose clips for tightness and examine the trunking for any cracks or splits and plus every the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best artifice to locate a leak is to have the engine presidency and hot and after that vaporizer lighter gas /propane or brake cleaner roughly speaking each joint in turn. If the engine rev s taking place you ve found your leak.
Its as well as worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not a hundred percent pump will every outcome in insufficient fuel swine delivered to the engine. Might also be worth cleaning out the idle rapidity direct motor / valve as these acquire clogged occurring subsequently carbon and some brake cleaner washed through helps free things off.
I don't have any check engine lights unless I unplug the MAF sensor. as soon as the MAF is plugged in subsequently the car will stall unless I put my foot upon the accelerator. There is as a consequence an intermittent popping sound coming at idle.