Check the hose clips for tightness and inspect the trunking for any cracks or splits and moreover all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best exaggeration to find a leak is to have the engine meting out and warm and then vaporizer lighter gas /propane or brake cleaner on the order of each joint in turn. If the engine rev s happening 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 under the weather pump will all consequences in insufficient fuel brute delivered to the engine. Might then be worth cleaning out the idle eagerness manage motor / valve as these get clogged happening gone 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. considering the MAF is plugged in then the car will stall unless I put my foot on the accelerator. There is then an intermittent popping strong coming at idle.