Quote: Kinda sounds like a vacuum leak or maybe a carb issue (internal blockage).
If you can't find an obvious leak, I had a problem with a factory street Hemi intake that had a pinhole in the floor under the rear carb going into the exhaust crossover. Took forever to find that. Had it welded up and it idled fine after that.
I have the rear carb off and the primary throttle shaft is extremely loose/worn. I may bring it somewhere to have bushings put in it or repaired as needed. I would think this could affect the idle quality? Also how do the idle mixture screws come out?
