Hello. 1980 Corvette 350 L-82 automatic tranny. New rebuilt. Installed yesterday.
The idle surges/pulses in drive and park (800 -1300 back and forth). I assume it is a vacuum leak. I sprayed carb cleaner around the base of the carb - no change. I covered up the top of the carb with my hand (all suggestions from this site) and it seemed to smooth out. What's next? How do i find the leak, and what exactly am I looking for? Any known culprits to start with? Thanks!