Repost as I still have the problem.

my '86 240 had a problem with the idle sticking high intermittantly then it got very ratty (missing, popping....

carb cleaner to the butterfly, cleaned the air cleaner, & changed the fire trap & it's a lot better but the

intermittant high idle persisted. today isolated to the butterfly flap screws were loose & the butterfly plate

hanging up. tightened the plate up but nowe it stumbles when you accelerate.

any ideas??(I tried adjusting the plate from fully closed to a little open & it's not better..

A little more on my ongoing dilemma;

I did try to locate a vacuum leak with card cleaner & detected nothing. Seems my problem is intermittant & perhaps comes on when things are hot. certainly it rears

itself when the car is under load (hard acceleration or up hill). When it's acting up, I can cruise around if I'm easy on the throttle. Recently it got so bad going up a hill

(after I thought I fixed it by tightening up the throttle plate screws) that the car shut off. I sat & let it cool & later made it home. This past weekend, I changed the fuel

filter. I then took it around town & up hills & it seemed fine. went home for shower & change of clothes & getting back in car it re-appeared bad as ever.

Could under hood temperature affect a vacuume leak or the fuel pressure regulator or could my new fuel filter be clogged now. I'm suspecting the under hood

computer module intermittant. First I'll try positioning the throttle plate as previously posted but since this is intermittant, & grossly problematic, I don't think this is my problem.