Carburetor: repair or replace?
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Mountain Pass
Joined: Aug 2024
Posts: 122
Likes: 44
From: Montgomery, Alabama
Thank you for your input. I'll let y'all know how it goes.
A.S.
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Mountain Pass
Joined: Aug 2024
Posts: 122
Likes: 44
From: Montgomery, Alabama
Just buy a new Holley and be done with it. if you want an electric choke you'll have to put a kit on it but no big deal.
People expect everything to have a lifespan except a carburetor, those are supposed to be good for 7,000 years. they're not. you won't regret buying a new one and it's last 50 years like the last one.
People expect everything to have a lifespan except a carburetor, those are supposed to be good for 7,000 years. they're not. you won't regret buying a new one and it's last 50 years like the last one.
Was there a great deal of tuning required when you installed your new Holley, or was it more plug and play?
A.S.
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Mountain Pass
Joined: Aug 2024
Posts: 122
Likes: 44
From: Montgomery, Alabama
A.S.
Cargo Master
Joined: Sep 2007
Posts: 2,470
Likes: 535
From: Chandler, AZ
The engine is a 360. When you push the accelerator pedal, she "stumbles" as if there's not enough fuel. I've not yet taken the carb off to see if there's debris in the bowl, but, given the neglect the truck experienced before I bought her in June, my guess is that something is up in the carburetor. I've also not yet changed the fuel filter or fuel pump. Should I do those too before I look at the carb?
A.S.
A.S.
If tip in, the accel pump diaphragm may be damaged. Look down the barrels and open throttle. Does it squirt fuel?
If part throttle stumble, that can be either damaged power valve, a partially obstructed main jet, or an obstructed passage.
A carb rebuild kit comes with a accel pump diagrams and a power valve. When you have it apart, clean passages and jets. That's it.
Mountain Pass
Joined: Jan 2021
Posts: 147
Likes: 36
out of the box, all I did was set idle, and idle air mixutre, I dont think the entore job took me more than an hr, and I was down the road again, I have had the carb in the truck for about 3 yrs now, and no complaints
Cargo Master
Joined: Sep 2007
Posts: 2,470
Likes: 535
From: Chandler, AZ
Sadly without an air fuel ratio gauge to tune a carb, it can be pig rich or dangerously lean and you can't really tell. But that has been the case for decades and trucks still go down the road.
A change of 1 or 2 main jet sizes makes a HUGE difference.
A change of 1 or 2 main jet sizes makes a HUGE difference.
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Mountain Pass
Joined: Aug 2024
Posts: 122
Likes: 44
From: Montgomery, Alabama
Update on carb issues
The Holley carb on which I had my eye is a manual choke model, and mine is an electric choke. I've watched a dozen videos on rebuilds, so I'm going to go that route. I reconnoitered the carb yesterday, and there's a significant fuel leak from the accelerator pump. From what I understand that's a sure sign a rebuild is required and is a cause of the issues I've been experiencing. Off to the Rock Auto website to order my parts.
A.S.
A.S.
Lead Driver
Joined: Oct 2018
Posts: 7,876
Likes: 2,364
You have to install the electric choke kit on the Holley. for whatever reason they don't offer one installed.
It will run fine out of the box, since I'm at 3200' elevation I always jet down 2 sizes before I install a new one and it seems to work out fine. your plugs will tell you.
when a new car left the factory it was jetted the same no matter where it was going. it's easy to put more thought into it than is needed.
It will run fine out of the box, since I'm at 3200' elevation I always jet down 2 sizes before I install a new one and it seems to work out fine. your plugs will tell you.
when a new car left the factory it was jetted the same no matter where it was going. it's easy to put more thought into it than is needed.
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