Carb Question
Thread Starter
Safety Car
Joined: May 1999
Posts: 4,445
Likes: 0
From: Mandeville, Louisiana
Carb Question
I have a Holley 4175 on my '70. It is about 2 years old. Sometimes, fuel drips out of the secondaries, and the car won't idle....like it is flooding out. Then, even afte ryou turn it off, you can see the fuel dripping out of the secondaries...and it is hard to restart. When this happens, black smoke comes out the pipes. It will do this for a while, then all of a sudden, it starts running right, and looking into the carb, you can see that the dripping secondaries has stopped.
Any suggestions?
Any suggestions?
Le Mans Master
Joined: May 2000
Posts: 6,493
Likes: 6
From: Bloomington MN
Cruise-In II Veteran
Re: Carb Question (Rob's 73)
Yep, I agree with Rob. I had the EXACT same thing happening this past summer with my 4160 carb. I just took a an air compressor nozzle, stuck it in the air horn, and blew the crap out (with a quick hit). I started it and looked, there was no fuel dripping, and it has run perfectly ever since 
.
AC
. AC
Thread Starter
Safety Car
Joined: May 1999
Posts: 4,445
Likes: 0
From: Mandeville, Louisiana
Re: Carb Question (A C)
OK....tried the air...no luck...but.....
Tapped on the seconday bowl with the back of a screw driver, and it stopped dripping, and ran right...
Would a sticking float in the secondary bowl cause the secondaries to fill up too much, and drip? What would cause it to stick?
[Modified by Eric 70, 11:53 AM 9/29/2001]
Tapped on the seconday bowl with the back of a screw driver, and it stopped dripping, and ran right...
Would a sticking float in the secondary bowl cause the secondaries to fill up too much, and drip? What would cause it to stick?
[Modified by Eric 70, 11:53 AM 9/29/2001]
Le Mans Master
Joined: May 2000
Posts: 6,493
Likes: 6
From: Bloomington MN
Cruise-In II Veteran
Re: Carb Question (Eric 70)
Yeah, I suppose it could be a stuck float. I have never had one, so I don't know what would cause it to stick. Maybe you ought to put a new needle and seat assembly in too. The one good thing about carbs is that most of the parts are cheap.
AC
AC
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: Carb Question (Eric 70)
Definitely sounds like either a bad/dirty needle and seat, or a sticking float. Either one will cause the bowl to overfill and then run way rich. I would replace the needle and seat, since it's only a $5 part.
Race Director
Joined: Apr 2000
Posts: 17,649
Likes: 189
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Re: Carb Question (Eric 70)
Needle and seat have a speck of dirt between them. Used to happen ot me alll the time.
I used to pull the whole needle and seat assembly out and blow it out and it worked
fine after that.
The only problem here is that I had to do it all the time, could be once it startes your
going to have the problem all the time too.
Finally bought a new carb.
I used to pull the whole needle and seat assembly out and blow it out and it worked
fine after that.
The only problem here is that I had to do it all the time, could be once it startes your
going to have the problem all the time too.
Finally bought a new carb.
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