Now you might think that spraying lighter gas vis--vis a hot engine isnt wise, however the flash /ignition point of gas is nearly 400C hence you habit a naked flare or spark to set it off and Ive used this method for many years without incident. produce an effect your way through each realizable joint one at a mature and you should find 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 concentrate on blast of gas into each area, especially those difficult to achieve as soon as large implements.
I started the car occurring this morning, it starts going on and runs at 1750 and within a minute or thus climbs higher than 2500.. It is handing out smooth though, just habit progressive than it should be. I as a consequence checked the throttle screw plate/return screw, intentionally 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 feel fine just 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 going on 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 occurring and is warmed up? oftentimes in engine be in many factors may cause the similar symptom(s)