Long time lurker here. I've gone over and gone over all the Weber install and tuning threads,but I have a little more unique problem than what i could find so here we go...
1986 :CJ7, Stock 258, with GM HEI dizzy, and just installed USED (mint) Weber 32/36. Redline adapter. Timing has been tried at 9* and 12*, vacuum lines have been tried in several configurations as well as completely plugged. Either gives a stron, steady 16* vacuum reading at the manifold.
1) It will start up and idle, but only when the choke is fully engaged. if it even opens a little it starts to die. Full open even when warm is impossible.
2) Mixture screw basically ha NO effect. I can thread it all the way in and all the way out with no change in engine speed. have removed it and observed no damage to the needle.
Not sure what to do. I'm nearly positive I have no vacuum leaks. Have tried several methods to find one. I'm no carb expert, and since the Weber sat unused for an extended period of time, I'm thinking maybe it needs a re build. But gotta say...it seems to work too well other than the problem stated, it revs up fine, etc. Any help here would be great.. Thanks in advance