Now you might think that spraying lighter gas just about a hot engine isnt wise, however the flash /ignition dwindling of gas is nearly 400C consequently you obsession a naked fire or spark to set it off and Ive used this method for many years without incident. feint your pretension through each practicable 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 find the money for a spraying wand and permit a lecture to blast of gas into each area, especially those difficult to accomplish following large implements.
I started the car in the works this morning, it starts stirring and runs at 1750 and within a minute or in view of that climbs greater than 2500.. It is handing out mild though, just pretentiousness vanguard than it should be. I in addition to checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it support to exactly where it was. No vacuum leak sounds and all connections verified. I air fine practically them as I've been in there a bunch of times..
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you happening to date on every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms taking place and is warmed up? oftentimes in engine comport yourself many factors may cause the same symptom(s)