Rebuilding carb
Thread Starter
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Fleet Owner
Joined: Dec 2000
Posts: 25,352
Likes: 5,374
From: Central PA
Rebuilding carb
Two weeks ago my truck left me sit. It was a fuel problem. I replaced the fuel filter and it ran but not real good. It was missing as if dirt was in the line. Then it wouldn;t start and finally it backfired and started and it ran great.
This weekend it ran as if the carb had dirt in it.
Question 1: Is it possible that dirt could be in the bowl since I put the new filter on?
Question 2: I am going to take off the carb and take it somewhere to be checked. Is it easy to "clean". It shouldn't need a rebuild as it was rebuilt about 8 years ago. But can a novice like me look for reasons for the poor running and fix it? Is it easy? I have never rebuilt a carb and don;t want ot screw it up. Also, what gaskets will I need?
Thanks! I am going out now to remove the carb.
This weekend it ran as if the carb had dirt in it.
Question 1: Is it possible that dirt could be in the bowl since I put the new filter on?
Question 2: I am going to take off the carb and take it somewhere to be checked. Is it easy to "clean". It shouldn't need a rebuild as it was rebuilt about 8 years ago. But can a novice like me look for reasons for the poor running and fix it? Is it easy? I have never rebuilt a carb and don;t want ot screw it up. Also, what gaskets will I need?
Thanks! I am going out now to remove the carb.
Elder User
Joined: Oct 2008
Posts: 556
Likes: 1
From: Prescott, AZ
Carbs are fairly easy to rebuild. You do not state what type of carb you have but most local parts places as well as Rock Auto, Summit racing will have kits.
You need some gasket remover solvent and a putty knife to remove the old gaskets. Normally everything you need including gaskets will be in the rebuild kit. They also sell solvents with baskets that you can soak and dissolve all the old gunk and gaskets but normally carb cleaner will work. Compressed air is also handy to blow out the orifices.
Check on-line; in many cases they have PDF files on the instuctions for you to download and read. It may help you decide whether you want to do it yourself. Holley has a great site but again you'll need the mfg and model of the carb.
Good luck.
You need some gasket remover solvent and a putty knife to remove the old gaskets. Normally everything you need including gaskets will be in the rebuild kit. They also sell solvents with baskets that you can soak and dissolve all the old gunk and gaskets but normally carb cleaner will work. Compressed air is also handy to blow out the orifices.
Check on-line; in many cases they have PDF files on the instuctions for you to download and read. It may help you decide whether you want to do it yourself. Holley has a great site but again you'll need the mfg and model of the carb.
Good luck.
Fleet Owner
Joined: Jul 2004
Posts: 27,288
Likes: 1,052
From: NM
It is more likely there is dirt/rust in the fuel lines coming from the tank, unless you've cleaned the tank and sealed it (or replaced it). This dirt/rust will prevent the check valves in the fuel pump from operating properly. The carb bowl can have a lot of dirt before it will create problems. Dirt/rust in the lines will also block flow to the pump.
Senior User
Joined: Oct 2008
Posts: 295
Likes: 1
I would suggest taking the new fuel filter off and if you can't see through it, try to tap it on something to see if any sediment shakes out of it. You might also want to put a filter inline between the pump and tank, just to make sure nothing gets stuck in the pump.
I thought I had a similar problem but I'm going to ignore it now. I took my sender out and peeked into the tank and it didn't look like it was too dirty. I stuck a powerful magnet on the bottom of the tank, opposite where the pickup is in hopes that it will attract any potential rust that might be floating around in there.
I thought I had a similar problem but I'm going to ignore it now. I took my sender out and peeked into the tank and it didn't look like it was too dirty. I stuck a powerful magnet on the bottom of the tank, opposite where the pickup is in hopes that it will attract any potential rust that might be floating around in there.
Fleet Owner
Joined: Jul 2004
Posts: 27,288
Likes: 1,052
From: NM
I would suggest taking the new fuel filter off and if you can't see through it, try to tap it on something to see if any sediment shakes out of it. You might also want to put a filter inline between the pump and tank, just to make sure nothing gets stuck in the pump.
I thought I had a similar problem but I'm going to ignore it now. I took my sender out and peeked into the tank and it didn't look like it was too dirty. I stuck a powerful magnet on the bottom of the tank, opposite where the pickup is in hopes that it will attract any potential rust that might be floating around in there.
I thought I had a similar problem but I'm going to ignore it now. I took my sender out and peeked into the tank and it didn't look like it was too dirty. I stuck a powerful magnet on the bottom of the tank, opposite where the pickup is in hopes that it will attract any potential rust that might be floating around in there.
The tank being clean is a good sign, but the low point of the system is the fuel line between the tank and the pump, so everything settles in there.
Thread Starter
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Fleet Owner
Joined: Dec 2000
Posts: 25,352
Likes: 5,374
From: Central PA
I've decided to take the carb to a buddy that has a garage to have it rebuilt. With final exams and grades due soon, I don't have time, so I thought I would have hm do it and do it right. Will let you all know how it runs when I get it back. I think I will add a filter between the tank and the fuel pump.
Thanks!
Thanks!
