Now you might think that spraying lighter gas around a warm engine isnt wise, however the flash /ignition narrowing of gas is roughly 400C so you dependence a naked flame or spark to set it off and Ive used this method for many years without incident. be active your mannerism through each practicable joint one at a time and you should find it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to allow a spraying wand and permit a forward blast of gas into each area, especially those difficult to attain next large implements.
Its also worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a below par pump will all repercussion in insufficient fuel being delivered to the engine. Might moreover be worth cleaning out the idle keenness rule motor / valve as these acquire 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. taking into consideration the MAF is plugged in later the car will stall unless I put my foot on the accelerator. There is plus an intermittent popping solid coming at idle.