What would cause my vac. advance to get gas in it? A lot of gas.It's a Crane adjustable unit with about 1500 miles on it.It is hooked to the carb base plate.I believe it has been this way for a while.It doesn't appear to work anymore either,so i'll just run without it for now.

thats one I never seen before. I would start with putting a vacume gauge on it and see what its doing. how's it run? does the motor seem like its loading up? where are you pulling your vacume from on the carb?

Im with wild bill 13 that is a new one.:wacko:Did you rebuild the carb and use an incorect gasket so the gas is getting through the ported vacume somehow?Only thing I could come up with.

Every time manifold vacuum drops, a little air and fuel mix is going to be sucked into the hose. Maybe the base plate has a poor design or location for that vacuum port. Maybe a big cam with lots of reversion could worsen the effect.

Can't say it's happened to mine though.

Engine runs,idles fine.The hose is on the carb base plate,below the throttle plates,rear of carb.Before i go any further i should say this is a Pontiac tripower.I haven't checked the vaccum but suspect it is on the low side with the size of cam.Maybe 5-7''@idle.The carb is from JET Performance,a 500cfm 2G.A very good carb i might add.I would have never even known of this problem id if hadn't pulled the dist. to do some detailing today,thats when i saw gas running out of the hose nipple.

Make SURE you don't have what I call 'post nasal drip' when at idle. Common with high float level, and I've seen boosters that drip under high vacuum condition. I'd check float level, fuel pressure, and needle/seat on that center carb.

Do all the carbs function the same? I have seen multi carb setups that use a primary carb to run on with the others kicking in when at heavy or full throtle. the only thing I can figure is when the rpm's drop and the advance returns to its low rpm position there's optimized fuel buildt up below the butterfly's and its drawing it into the advance.

i've had that happen to me but never told any one about it, i didn't want anyone to think i was nuts, i drained it and readjusted the carb, a new base gasket also, everything seems fine now. hope this helps

I know all to well about it. It just killed my vacuum can....

http://www.chevelles.com/forums/showthread.php?p=2949753

Fluid in the vacuum advance OR in the transmission modulator is not at all uncommon WHEN THE HOSES/TUBING IS NOT FORMED PROPERLY.

Both the vac advance plumbing and the trans modulator plumbing need to be formed with a "high spot" so that any fluid rolls down-hill back to the carb rather than dripping into the vacuum-powered device.

Think this may help?

http://www.summitracing.com/parts/SMP-DCV1/

Think this may help?

http://www.summitracing.com/parts/SMP-DCV1/
No. I have no idea why Ford would put that in the hose to the vacuum advance.

So really the only fix is to add a vapor trap such as a loop or just a general "high" area in the tube running to the advance? How "high" does it need to be? Just as long as it is above the base plate of the carb....