Now you might think that spraying lighter gas in this area a hot engine isnt wise, however the flash /ignition narrowing of gas is about 400C thus you need a naked blaze or spark to set it off and Ive used this method for many years without incident. statute your way through each doable joint one at a time and you should locate it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to manage to pay for a spraying wand and permit a direct blast of gas into each area, especially those difficult to accomplish considering large implements.
Its plus 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 every result in insufficient fuel innate delivered to the engine. Might in addition to be worth cleaning out the idle readiness govern motor / valve as these get clogged up behind 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. as soon as the MAF is plugged in subsequently the car will stall unless I put my foot upon the accelerator. There is moreover an intermittent popping hermetically sealed coming at idle.