So i put another rebuilt from factory (80$) Holley 5200 carb (I know get a weber and I will when income tax return comes) on my car and it WAS running great. But after my timing belt went and I had the timing set wrong when I tried to start it. It popped through the carb a couple of times and now it wont idle down and turning the air fuel mix and idle control down wont do it. I checked for vacumm leaks externaly and have none. So im thinking internal vacumm leak? How do you tell if it is internal and how do you fix it. Oh and the one time it popped there was a small fire that went right out. The car runs great but I just cant get it to idle less then 2000 rpms. I can even get 7200 rpms out of it now before the valves float.

Some of the 5200's have idle cut solenoids - did you wire it if it has one?

 

There's really no way to get an "internal" vac leak unless the carb top gasket is shot - but assuming it's rebuilt that's not an issue I'm sure. Backfireing through the carb wouldn't hurt it.

 

GD

Some of the 5200's have idle cut solenoids - did you wire it if it has one?

 

There's really no way to get an "internal" vac leak unless the carb top gasket is shot - but assuming it's rebuilt that's not an issue I'm sure. Backfireing through the carb wouldn't hurt it.

 

GD

No wires. And I put this carb on 3 days before the belt went. The car was running great untill it broke. Popped like ten times through the carb hard enough to push my caps off of un used vacumm ports. I Only run three lines. 1 for disty, 2 for booster, 3 for heater. Its got to be some kind of leak because when you rev it it comes down off of rpms in like steps. Any chance I blew the rubber on the acclerator pump? I am going to get a weber but need to keep this thing going for now. I guess its time to pull apart the other 5200 I have that did the same thing on another engine I had it on and it popped through the carb to.

Thanks again GD!!