Now you might think that spraying lighter gas on the subject of a hot engine isnt wise, however the flash /ignition narrowing of gas is about 400C in view of that you compulsion a naked fire or spark to set it off and Ive used this method for many years without incident. bill your pretentiousness through each realizable joint one at a times 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 have the funds for a spraying wand and allow a talk to blast of gas into each area, especially those hard to accomplish in the same way as large implements.
I started the car going on this morning, it starts happening and runs at 1750 and within a minute or therefore climbs greater than 2500.. It is dispensation serene though, just quirk higher than it should be. I plus checked the throttle screw plate/return screw, deliberately turned it out and nothing changed. put it put up to to exactly where it was. No vacuum leak sounds and all links verified. I vibes good more or less 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 in the works 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 going on and is warmed up? oftentimes in engine law many factors may cause the similar symptom(s)