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-   -   Holley 4160 (marine) too rich (http://www.clubcobra.com/forums/holley-tuning/109665-holley-4160-marine-too-rich.html)

MOTORHEAD 03-16-2011 08:05 PM
Holley 4160 (marine) too rich
 
I have 2 351W's with holley carbs in my boat. One runs fine, the other won't idle (dies). While running at a hi idle, fuel is dripping/spraying out of the main disgharge nozzels, and drips out at low idle, and dies. Looks like too hi float level or pump pressure or power valve leaking . Had carb apart twice today. First time everything looked ok, all passages open, float level ok. Reinstalled, no improvement. 2nd time I replaced power valve and needle & seat. Still no joy. Vac 13-15" at 700-1000 rpm, fuel pump pressure 8psi.
Any ideas?:confused:

Jerry Clayton 03-16-2011 08:29 PM
lower fuel pressure to 3-5 lbs

Barnsnake 03-16-2011 08:35 PM
Take the float out, shake it, and listen for liquid in it.

MOTORHEAD 03-16-2011 08:39 PM
Jerry: thanks for the info. I couldn't remember the proper setting. 8 psi did seem too hi !

Jim: no problem there, solid floats !

Gaz64 03-17-2011 04:42 AM
Quote:
Originally Posted by MOTORHEAD (Post 1116750)
Jerry: thanks for the info. I couldn't remember the proper setting. 8 psi did seem too hi !

Jim: no problem there, solid floats !
Solid floats doesn't mean they won't absorb fuel, which all nitrophyl floats eventually do.

They have to weigh below a maximum weight as specified by the carb manufacturer.

CobraEd 03-19-2011 10:31 AM
I would think that there is too much fuel pressure.


.

MOTORHEAD 03-19-2011 11:46 AM
Yeah, I installed a regulator & set it to 5psi. That solved the problem.


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