Re: I'm Rich!

Posted by 32model901 On 2011/12/17 19:16:07

Had a similar problem on an earlier model. Drove me nuts until I found out the new needle valve seat was not machined properly and didn't seat properly into the carburetor casting.

Even though the needle valve was seating and sealing properly there was a small constant leak past the needle valve seat threads that raised the fuel level in the float chamber.

Finally traced it down by attaching a piece of clear plastic tubing to a drain fitting on the bottom of the float chamber. This allowed me to check the actual fuel level as the car was running.

I saw the fuel level was running high even though I had bench checked the fuel level in the bowl. I pulled the carb. off again and applied 2 - 3 lbs. fuel pressure, and now saw some leakage past the needle valve threads, even though I had the needle valve closed.

Check for a leak past the needle valve that is raising the fuel level in the carb. or a crack in the casting draining fuel from the bowl into the intake.

Good Luck!