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Old 07-09-2006, 02:16 PM
crusherdbuzz's Avatar
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Holley carb problem

I just rebuilt a 4160 with vac. secondaries. I finally got it on the engine to get it started etc. After a few leaks and such the engine finally got turned over. However, I could hear a very loud whistling noise (probably a vacuum leak). Anyway I got the carb somewhat set on idle mixture/idle rpm the best I could because the loud whistling noise made it difficult to hear anything. After I shut the engine off, fuel started leaking through one of the main throttle shafts that goes through the base plate (not sure which I dont' remember). This would make sense if air was being drawn through the shaft by engine vacuum forming the whistle and when there is no vacuum the excess fuel finds its way out. I don't want to use this carb right now because on a hot intake it could start a fire. What is the remedy to this? The only thing I can think of is to call holley and order a new baseplate w/ throttleshafts for my specific model carb. Has any of you encountered this problem and what is the fix? I just want to make sure this is my only option to fix the carb.

Regards,
Dennis

The list is 1850-1 1717 and the only baseplates i've found on summit do not have an application for 1850-1 any ideas?

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Last edited by crusherdbuzz; 07-09-2006 at 02:26 PM.
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Old 07-09-2006, 02:48 PM
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You still have a leak, are they new correct gaskets ?
Adjust the floats.
Put the idle screws at 3/4 turn out.
The Knowledge Base has info, Holley has a free downloadable manual and trouble shooters guide.
http://www.holley.com/
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Old 07-09-2006, 02:58 PM
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yeah I still have the leak, I havn't bought a new baseplate though. I adjusted the floats to the instructions given on the rebuild instructions. The idle mixture screws were turned 1/2 inch out when the car turned over.
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Old 07-09-2006, 03:12 PM
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