Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

hard start hot and white vapor out top of eddy #1904

<< < (2/3) > >>

von:
My guess is either a bad float, bad needle and seat or a leak between the seat and carb body. A common mistake is accidentally leaving an old seat gasket in place when installing a new one. Also sometimes the seat gasket surface of the carb body gets damaged or eroded.

kelly76:
Thanks Von. When I pulled carb yesterday! I inverted it and pulled vacuum on fuel inlet and the needle/seat held tight.  The float was in the kit I got from cliff but it could be bad I suppose.

I checked for the seal before I screwed in the seat but I could have missed it. Would the needle/seat hold a steady vacuum if the old seal was still in place?

kelly76:
Also! How do I check the float? It's the black float that came in cliff's kit. Do I just drop it in a container of fuel and make sure it floats?

SundanceKid:
Are the well plugs leaking?

kelly76:
Pretty sure they aren't.. I tested them according to cliff's book with soapy water and air pressure. I can now start the car, run it for 20 seconds when cold, shut it off and immediately look down carb and see fuel dripping heavily on the primaries. Feels like float is too high. Not sure how low I can adjust it and be okay.

Navigation

[0] Message Index

[#] Next page

[*] Previous page