Check the hose clips for tightness and examine the trunking for any cracks or splits and moreover all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best showing off to locate a leak is to have the engine executive and warm and then vaporizer lighter gas /propane or brake cleaner on the order of each joint in turn. If the engine rev s going on you ve found your leak.
Its as a consequence worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not at your best pump will all result in insufficient fuel subconscious delivered to the engine. Might afterward be worth cleaning out the idle quickness govern motor / valve as these get clogged taking place next 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. in the manner of the MAF is plugged in after that the car will stall unless I put my foot upon the accelerator. There is also an intermittent popping solid coming at idle.