Cliff's Quadrajet Parts and Rebuild Kits

Quadrajet Problem Solving => Diagnose a Quadrajet carburetor problem => Topic started by: sixth_sense676 on December 08, 2012, 08:49:41 PM

Title: Have to Prime the Carb on Every Cold Start
Post by: sixth_sense676 on December 08, 2012, 08:49:41 PM

I rebuilt my 800cfm Q-Jet with one of Cliff's HP kits. It works great, except for the fact that I have to prime the carb on every cold start to get it to run. Could this be because of the Windowed Seat allowing the fuel to to escape when the engine isn't running?

Title: Re: Have to Prime the Carb on Every Cold Start
Post by: Cliff Ruggles on December 11, 2012, 05:28:38 AM

Fuel bowl is empty.  The only way it's going to be empty is leaking bottom plugs, or evaporation.  A "windowed" seat wouldn't allow the bowl to drain out.....Cliff

Title: Re: Have to Prime the Carb on Every Cold Start
Post by: bigvette1 on February 05, 2013, 08:32:07 AM

I also understand that if the diaphram in the fuel pump is tired or has a hole it will allow the fuel in the line and in bowl to be sucked back to the pump, emptying the bowl out.  If you have a rubber hose feeding the fuel inlet, after you run the car, clamp off the fuel inlet hose and then when you start in a day or so, unclamp and see what happens.

Title: Re: Have to Prime the Carb on Every Cold Start
Post by: 429bbf on February 05, 2013, 08:31:03 PM

676 fixed mine by leaving the little wire off the needle .read it in clifffs book. works perfect.took one apart the guy had hooked the wire in the little holes instead of over the tab. caused all kinds of prob.fwiw.dean