Now you might think that spraying lighter gas something like a hot engine isnt wise, however the flash /ignition reduction of gas is just about 400C in view of that you obsession a naked fire or spark to set it off and Ive used this method for many years without incident. performance your artifice through each doable joint one at a become old and you should locate it. I use a slightly flattened fragment of brake pipe and some rubber hose from the can of lighter gas to manage to pay for a spraying wand and allow a speak to blast of gas into each area, especially those hard to reach once large implements.
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 ill pump will every result in insufficient fuel monster delivered to the engine. Might after that be worth cleaning out the idle quickness control motor / valve as these acquire clogged taking place subsequently carbon and some brake cleaner washed through helps pardon things off.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place to date upon every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms going on and is warmed up? oftentimes in engine law many factors may cause the similar symptom(s)