Carb must be primed
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Junior User
Joined: Mar 2012
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From: North East Arkansas
Carb must be primed
I have a 1983 Ford F100 that has been setting up for a couple of years. My son and I have been working on it. It is to be his first vehicle. We have dropped the fuel tank and cleaned it, replaced the sending unit and fuel pump. The carb is a Motorcraft 2bbl 2150. We rebuilt it with a kit and put a manual choke on it. The problem now is it will not start unless primed. We removed the gas line and the fuel pump is working. Once the truck starts it runs fine untill you kill it. Could it be the accelerator pump? Any help would be appreciated.
Fleet Mechanic
Joined: Jul 2011
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What do you mean the carburetor has to be primed for it to start?
Do you mean pumping the gas pedal before you crank it? If your choke is set right, and the carburetor has a fresh rebuild with fresh gas, then I would assume that you could hit the pedal once, pull the choke lever out, then hit the key and it start right up.
Try checking your fuel filter.
I'm assuming this is a 302?
I doubt very seriously it's the accelerator pump causing your problems. To check for accelerator pump functionality, open the choke up and manually work the throttle back and forth a full stroke, quickly, and look for a strong stream of gas. If you get a strong stream, it's working just fine.
Did you set your float right?
Do you mean pumping the gas pedal before you crank it? If your choke is set right, and the carburetor has a fresh rebuild with fresh gas, then I would assume that you could hit the pedal once, pull the choke lever out, then hit the key and it start right up.
Try checking your fuel filter.
I'm assuming this is a 302?
I doubt very seriously it's the accelerator pump causing your problems. To check for accelerator pump functionality, open the choke up and manually work the throttle back and forth a full stroke, quickly, and look for a strong stream of gas. If you get a strong stream, it's working just fine.
Did you set your float right?
Postmaster
Joined: Jan 2012
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From: Richmond
+1 for clarification. It requires a couple taps of the accelerator, or the carb has to have gas poured into it?
Two things come to mind: vacuum leaks or carb leaks. When I was getting my truck running, after I had rebuilt the carb, it would require a couple taps to get it started. That, or mashing the throttle immediately after it turned over. Tightening the carb mounting, and fixing a couple other vacuum leaks alleviated this.
Two things come to mind: vacuum leaks or carb leaks. When I was getting my truck running, after I had rebuilt the carb, it would require a couple taps to get it started. That, or mashing the throttle immediately after it turned over. Tightening the carb mounting, and fixing a couple other vacuum leaks alleviated this.
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Junior User
Joined: Mar 2012
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From: North East Arkansas
By primed I mean pouring gas into the carb. We set the float according to the instructions and a new fuel filter was put on. It is on a 302. Dave I will check for leaks. The carb has been off and on several times and might not be tight enough. Thanks
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Junior User
Joined: Mar 2012
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From: North East Arkansas
Ok, I worked the throttle and saw no gas with the choke open. I took the top off the carb and the bowl was full. Float looked to be correct and in good shape. At this point I am frustrated and thinking new Carb. People on here seem to prefer Edelbrock over Holly. Is there anything else I can try before spending that kind of money?
Moderator
Joined: Jan 2001
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From: Virginia
I bet you forgot one of the little ***** that goes into the carb. Some of them also have little pointed needle valves that do the same thing, and are easily lost.
Time to take the carb off again, and go through it looking for these missing pieces. It's easy to do, and is part of the learning curve doing your first carb rebuild.
Time to take the carb off again, and go through it looking for these missing pieces. It's easy to do, and is part of the learning curve doing your first carb rebuild.
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Postmaster
Joined: Jan 2012
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From: Richmond
Did y'all use any online videos? Granted, my carter is much simpler, but they were an enormous boon for this first timer. I think the best I found on youtube was from a guy that runs a website "Mikes carburetor parts"
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