Check the hose clips for tightness and examine the trunking for any cracks or splits and with all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best quirk to locate a leak is to have the engine dealing out and hot and after that spray can lighter gas /propane or brake cleaner something like each joint in turn. If the engine rev s in the works you ve found your leak.
Its along with 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 monster delivered to the engine. Might along with be worth cleaning out the idle enthusiasm run motor / valve as these get clogged in the works later than 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. behind the MAF is plugged in next the car will stall unless I put my foot on the accelerator. There is also an intermittent popping unquestionable coming at idle.