Heres the whole story. I had a couple leaky gaskets on my carb. I rebuilt it using a holley trick kit. put it back on and ran real bad. after setting everything like it was sapposed to be. 1 week later the bad stumble off idle went away.
It has ran fine for 3 months, and over that period of time I developed a very tiny vaccum leak at the rear of the manifold. Not a big leak, just enough to make that high pitch whine and drive you nuts.
So I finally got around to putting new gaskets in, etc. And made sure they had red rtv on the bolt threads, etc. Next thing I know my dad knocked my carb over and left it standing on the secondary bowl for 4 hrs. (I dont know if that had anything to do with problem) put everything on and fired it up, ran crappy just like after I had rebuilt the carb. Even after playing with the timing, nothing helped. But the vacuum leak was gone!
Everyone thought that it was foreign objects plugging things in the carb before. But I have a clear glass fuel filter on and its clean as a whistle.
The exact problem is this, I give it 1/2 throttle when from a stop and it falls flat, and when moving and it hesitates almost as bad. What kills me is I didn't do anything to the stupid carb!
Plus just now drove it home from work, and it didnt want to idle, about 500 and when I put it in park the idle wouldnt come up... And popping out the exhaust like mad. Then I got out and turned up the idle screw a hair (1/16 turn), then grabbed a screwdriver and flashlight, and the idle picked up by itself, up to 1000 from about 450 (I think it saw me coming with the screwdriver!!!) And the popping out the exhaust quit also.
Please help. Anny suggestions? new carb? anything?
69 Camaro 1977 350
Shift kit, HEI, holley 600, flowmaster delta flow mufflers