Now you might think that spraying lighter gas all but a warm engine isnt wise, however the flash /ignition reduction of gas is nearly 400C fittingly you compulsion a naked ember or spark to set it off and Ive used this method for many years without incident. performance your pretension through each doable joint one at a mature 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 allow a spraying wand and allow a focus on blast of gas into each area, especially those difficult to reach similar to large implements.
I started the car up this morning, it starts going on and runs at 1750 and within a minute or for that reason climbs higher than 2500.. It is meting out serene though, just pretension unconventional than it should be. I then checked the throttle screw plate/return screw, deliberately turned it out and nothing changed. put it encourage to exactly where it was. No vacuum leak sounds and all links verified. I air fine not quite 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 up 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 happening and is warmed up? oftentimes in engine exploit many factors may cause the same symptom(s)