Weeping carb- No joke
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From: Cape Cod, Mass.
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In reference to a carb, weeping usually means leaking. Audible sounds like whistling usually are indicative of a vacuum leak often at the base of the carb where it sits on the intake (gasket issue).
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Gasket problem at carb base and/or gasket problem with carb. Manifold vacuum is finding a way 'out' of the carb assembly, somehow. Wait till it happens again, then remove air cleaner and tighten the main carb hold-down bolts a bit. Don't exceed specified torque for those bolts, but check to see if the sound changes when you tighten them.
If that has a significant effect, you can then try to determine exactly where the vacuum leak is by spraying little puffs of brake cleaner at speicific spots on those gaskets. When aimed at the vacuum leak, the engine should increase in rpm's a bit.
Once you've determined the exact point of leakage, you can decide how to permanently fix it. And, NO, duct tape is NOT the answer!
Thread Starter
Racer
Joined: Jul 2001
Posts: 483
Likes: 3
From: d.d.o quebec
Thanks guys never thought about a vacuum leak....I will check.
Now how about the bad and overly rich fuel smell. Is it a jet thing or a mixture thing? I have a speed Demond no air pollution control
Now how about the bad and overly rich fuel smell. Is it a jet thing or a mixture thing? I have a speed Demond no air pollution control
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
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Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
this usually happens after you shutoff a hot mill and the fuel in the carb bowls starts to boil and yes you can hear it
also will cause a rich smelling condition
normal stuff with a carbed engine.....this could be your problem...jmo....good luck....
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Gasket problem at carb base and/or gasket problem with carb. Manifold vacuum is finding a way 'out' of the carb assembly, somehow. Wait till it happens again, then remove air cleaner and tighten the main carb hold-down bolts a bit. Don't exceed specified torque for those bolts, but check to see if the sound changes when you tighten them.
If that has a significant effect, you can then try to determine exactly where the vacuum leak is by spraying little puffs of brake cleaner at speicific spots on those gaskets. When aimed at the vacuum leak, the engine should increase in rpm's a bit.
Once you've determined the exact point of leakage, you can decide how to permanently fix it. And, NO, duct tape is NOT the answer!
The fuel percolation theory may make sense, as it only happens after you drive it for awhile. I've never actually experienced it myself, so I can't really say all that much about it, but on the other hand, I've never seen a vacuum leak that came and went, either. Doesn't mean it can't happen, though, I guess. Yeah, I know, big help, right? LOL! Sorry I can't be of more help, man.
Keep the shiny side up!
Scott
you guys are killing me
Thread Starter
Racer
Joined: Jul 2001
Posts: 483
Likes: 3
From: d.d.o quebec
all kiding aside, im' surprised no one has mentioned "Fuel percolation"
this usually happens after you shutoff a hot mill and the fuel in the carb bowls starts to boil and yes you can hear it
also will cause a rich smelling condition
normal stuff with a carbed engine.....this could be your problem...jmo....good luck....
this usually happens after you shutoff a hot mill and the fuel in the carb bowls starts to boil and yes you can hear it
also will cause a rich smelling condition
normal stuff with a carbed engine.....this could be your problem...jmo....good luck....
