Now you might think that spraying lighter gas approaching a hot engine isnt wise, however the flash /ignition dwindling of gas is about 400C so you compulsion a naked fire or spark to set it off and Ive used this method for many years without incident. show your exaggeration through each reachable joint one at a epoch and you should find it. I use a slightly flattened fragment of brake pipe and some rubber hose from the can of lighter gas to give a spraying wand and allow a refer blast of gas into each area, especially those difficult to accomplish as soon as large implements.
I started the car going on this morning, it starts in the works and runs at 1750 and within a minute or in view of that climbs beyond 2500.. It is admin smooth though, just pretentiousness innovative than it should be. I as well as checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it support to exactly where it was. No vacuum leak sounds and all connections verified. I environment good about 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 all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms up and is warmed up? oftentimes in engine play many factors may cause the same symptom(s)