1953 Flathead acceleration issue
 

I just rebuilt my holley teapot carburetor and it runs great at idle but when I give it 1/4 to 1/2 throttle it spits then dies. The float looks level from the top. I replaced the fuel filter and the pump is mechanical but not that old. I also replaced the distributor cap and rotor and the vacuum advance on it to eliminate that from being a possible issue. Any other thoughts?

Thanks

Re: 1953 Flathead acceleration issue
 

Sounds like the accelerator pump is not working. There should have been a new one in the rebuild kit. Make sure it has a snug fit in the cylinder. Also make sure you put in the check-ball to allow the pump to make pressure.

Re: 1953 Flathead acceleration issue
 

Try moving the pump adjustment to the hole that is farthest from the shaft center line.



https://www.fordbarn.com/forum/pictu...ictureid=40738

Re: 1953 Flathead acceleration issue
 

Accelerator pump, picture attached.

Prior posts may give you a few hints, as to correct float and fuel levels:

https://www.fordbarn.com/forum/showt...ht=float+level

https://www.fordbarn.com/forum/showt...vel+carburetor

Re: 1953 Flathead acceleration issue
 

Update on my running issue:

I moved the pump adjustment over to the right from the middle and it helped alittle. But I also found the diaphragm from the kit for the power valve was another shorter then the original so luckly i saved the old one and put it in and now its running like a champ. Thanks for the help guys