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Recently bought a 1978 F150 with 351 - when we had the truck on level ground, it runs/sounds great but as soon as it is on an incline, the engine sputters, runs rough and will shut off. Barely got back in the garage but as soon as it was on level ground again, engine started running great again. What should we be looking at to fix this?
I agree I'd start with the float level. if that's not it I'd wonder about the pickup tube and screen in the tank. if you have dual tanks switch them and see if it makes a difference.
Sounds like great advice above, what carb exactily? Looks like a stock OEM Motorcraft 2150 2 bbl in the other thread where you posted a picture. Welcome to all three of you to FTE, check your visitor messages and PM (private messages).
Float too high or a old leaking power valve will do it. Could be several things though, those would be my "usual suspects" lists. If this just started out of the blue, I'd favor the power valve, or even just a float needle & seat not sealing well.
I'd be looking at a quality carburetor rebuild kit, and you can't be too clean doing the rebuild. Take time, read and understand instructions.
Yes, it is a Motorcraft 2150. Thank you for information!
When we bought it, fuel was leaking from the accelerator pump, so we changed that. I bought a carb rebuild kit to get the accelerator pump with the plan to eventually rebuild it. Looks like that will happen sooner than later.
Last edited by sambfred; Aug 30, 2023 at 07:29 PM.
Sounds like you have a plan and the parts, and that is a solid 1st and 2nd step. Now check out your PM (private messages) and visitor messages (click on your username or User CP (control panel) to access.
Yes, it is a Motorcraft 2150. Thank you for information!
When we bought it, fuel was leaking from the accelerator pump, so we changed that. I bought a carb rebuild kit to get the accelerator pump with the plan to eventually rebuild it. Looks like that will happen sooner than later.
I bet when you changed the accl pump you flipped the carb upside down right?
If there was junk on the float bowl floor you now moved that all over the place.
I think pulling the carb apart fore a good cleaning and blow out / rebuild will fix the issue.
Originally Posted by 77&79F250
Sounds like you have a plan and the parts, and that is a solid 1st and 2nd step. Now check out your PM (private messages) and visitor messages (click on your username or User CP (control panel) to access.
Being new to FTE I dont think he had enough posts to check / use PM's. Think he needs what 10 posts to use PM?
Dave ----
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