Holley 4160 Secondaries Leaking?

[pyroman]

I have a Holley 4160 on my 302 that's less than 2 years old. I bought it brand new from summit about a year and a half ago. To this point I haven't had any problems with it. However last weekend I was having starting issues. It would start run fine for awhile and then bog, and idle roughly and eventually die. I tried restarting it with no luck. I figured I had flooded it while attempting to start it so I let it sit for a few hours. Later I was able to start it and it seemed to be doing ok.

Now today I went out and it started fine. However after a few minutes the same symptoms returned. While it was running poorly I took off the air cleaner to notice that my secondaries were leaking (dripping) at idle. I shut it off for a little while and went inside. When I came back it started fine and the secondaries weren't leaking. But, once it had been idling for awhile they began to start dripping again.

The first time this happened last week I noticed fuel dripping from underneath the diaphragm onto the intake as well.

So my secondaries are leaking at idle, what could be the problem?

 

[woodsnake]

I'm pretty sure your floats have self adjusted out of adjustment.

Check them......

 

[D.Hearne]

Exactly what carb do you have? 4160's come in many different sizes and configurations. Could be either a bad secondary accellerator pump diaphram or a piece of trash keeping the needle/seat from closing.

 

[pyroman]

It is a 4160 600 CFM, non-adjustable float, electric choke, model number 0-80457S

Holley 0-80457S - Holley Model 4160 Non-Adjustable Float Carburetors - Overview - SummitRacing.com

 

[D.Hearne]

You have a stuck needle/seat. Next time it does this, tap the top of the needle/seat with a screw driver handle and see if that fixes it. Sometimes it's just a piece of trash stuck in there and a sharp rap on it will dislodge it.

 

[gjz30075]

Had the same issue with the same carb, although mine took about a year to surface. My carb is a reman right from Holley. Mine turned out to be small metal shards all over the float bowl, apparently hanging up in the needle and seat at times. I don't know where they came from but after a good cleaning the problem went away.

I found other 'quality control' issues with this carb so I suspect their reman process is maybe a bit sloppy. I wonder if Summit's 4160s are remans from Holley? Just a thought.

 

[pyroman]

Ok sounds pretty simple. I'll take a look at this weekend. Thanks!