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Help! Secondary fuel bowl draining into engine #2669869
06/25/19 06:07 PM
06/25/19 06:07 PM
Joined: Oct 2010
Posts: 156
michigan
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6pakdakota Offline OP
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6pakdakota  Offline OP
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What would cause the secondary fuel bowl to pour fuel out of the baseplate hole circled in the photo? I have already changing the accelerator pump diaphragm. [Linked Image]

Re: Help! Secondary fuel bowl draining into engine [Re: 6pakdakota] #2669873
06/25/19 06:24 PM
06/25/19 06:24 PM
Joined: Dec 2005
Posts: 1,495
Shelby mi.
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JAKE68 Offline
pro stock
JAKE68  Offline
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Posts: 1,495
Shelby mi.
either float too high or a plugged air bleed causing a siphon and draining bowl


JAKES AUTOMOTIVE
Re: Help! Secondary fuel bowl draining into engine [Re: JAKE68] #2669878
06/25/19 06:30 PM
06/25/19 06:30 PM
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Washington
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madscientist Offline
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Washington
That's usually a blown power valve, or most likely, if the rear block has a provision for a power valve and you are running a plug (or even the power valve) that plug (or power valve) can be hitting the boss in the power valve well in the main body.

Look very close at the boss in there. Take the gasket off the metering block and with the PV or plug installed make damn sure nothing is hitting anything.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: Help! Secondary fuel bowl draining into engine [Re: madscientist] #2669993
06/25/19 10:41 PM
06/25/19 10:41 PM
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Posts: 43,173
Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
Originally Posted by madscientist
That's usually a blown power valve, or most likely, if the rear block has a provision for a power valve and you are running a plug (or even the power valve) that plug (or power valve) can be hitting the boss in the power valve well in the main body.

Look very close at the boss in there. Take the gasket off the metering block and with the PV or plug installed make damn sure nothing is hitting anything.
iagree scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Help! Secondary fuel bowl draining into engine [Re: Cab_Burge] #2670025
06/26/19 01:58 AM
06/26/19 01:58 AM
Joined: Oct 2010
Posts: 156
michigan
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6pakdakota Offline OP
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6pakdakota  Offline OP
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Hopefully I will have time to get a better look at it in the morning.

Re: Help! Secondary fuel bowl draining into engine [Re: 6pakdakota] #2670097
06/26/19 09:21 AM
06/26/19 09:21 AM
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Posts: 17,844
S.E. Michigan
ZIPPY Offline
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S.E. Michigan
One of mine did that, and it turned out I had somehow warped the metering block.

I hope yours is a cheaper fix.


Rich H.

Esse Quam Videri




Re: Help! Secondary fuel bowl draining into engine [Re: ZIPPY] #2670167
06/26/19 12:08 PM
06/26/19 12:08 PM
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Washington
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madscientist Offline
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Originally Posted by ZIPPY
One of mine did that, and it turned out I had somehow warped the metering block.

I hope yours is a cheaper fix.


Yep. That happens too. Also, the main body can warp and drive you nuts. Before I had a mill, I used a roughing file and filed the main body flat. When the metering block is warped...that's a horse of a different feather. At that point, I'm looking at a new carb. With billet blocks and base plate and an aluminum main body that doesn't seem to warp like that Holley zinc mix or whatever it is.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: Help! Secondary fuel bowl draining into engine [Re: madscientist] #2670328
06/26/19 05:56 PM
06/26/19 05:56 PM
Joined: Oct 2010
Posts: 156
michigan
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6pakdakota Offline OP
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Well I got the carb fixed today. I replaced the orange plug above the accelerator pump and I think I had the wrong style metering block gasket on there. It works great now.







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