Started the Jeep up last night (Factory AMC 304 V8, Holley 600 CFM 4bbl.)

Noticed a fuel-leak/drip from the Right, Rear corner of the carb. Initially, it looked like it was coming from the Vacuum-Secondary Diaphragm Housing (but that wouldn't make any sense.)

I tried to track the leak down, but no luck visually.

When I removed the carb from the intake, the carb/intake gasket had a pool of fuel on it.

I'll take it apart soon, but does this sound like a blown power valve, or something else?

The Power-Valve is only two-weeks old, and carb was "New" in 1999, so it should have Holley Factory Power-Valve blow-out protection (post 1991 carb.)

If not a blown power-valve, what type leak does this seem like?

It sounds like the power valve but maybe the fuel isn't passing a blown diaphram but instead either the wrong style gasket was used (there are three styles) or the powervalve isn't tight enough, I've found both in the past... Did the power valve have a small step to locate the gasket? Which style gasket did you use? the hole in the center some are round, some are three sided & some have locator legs... If the valve has the locator step you need the round centered gasket...

Good point. I'll check that.

When I removed/replaced the power-valve, I noticed there were "Two" PV gaskets under the old PV.

I replaced both the PV and gasket(s) with the one from the Holley Rebuild Kit (was a Factory, not a Generic-brand kit.)

In any event, I'll still check it and check for tightness too.

On the one hand I only use genuine Holley kits, on the other I know they tend to still provide the older style gaskets even though they provide the newer style power valve with the locating step so if your duplicating what you took apart rather than knowing whats been revised it's easy to have a problem... Good luck, I'm sure you'll sort it out..

Actually, I didn't "duplicate" as I only installed a single gasket this time, (when I removed the previous double gaskets.)

That said, I should look to make sure (that with the step) it actually seals when tightened down. I might need to use two gaskets to provide a seal (that is if that turns out to be the problem.)

In any event, Thanks Again. Sounds like this very likely IS the cause.

Probably why I had Two gaskets in there from the previous rebuild in 2004.