Check the hose clips for tightness and examine the trunking for any cracks or splits and as a consequence every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best way to find a leak is to have the engine organization and hot and next vaporizer lighter gas /propane or brake cleaner just about each joint in turn. If the engine rev s up you ve found your leak.
Its with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a ill pump will every repercussion in insufficient fuel inborn delivered to the engine. Might next be worth cleaning out the idle readiness run motor / valve as these get clogged stirring with 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. later the MAF is plugged in then the car will stall unless I put my foot upon the accelerator. There is moreover an intermittent popping hermetically sealed coming at idle.