Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

How Do You Combat Hot Fuel?

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omaha:
  The tee would be somewhat close to the carb inlet, I think the closer the better.  An electric pump would keep the psi up at idle and would help a little. to a certain extent. The bypass helps keep the fuel circulating, thus relieving some of the heat and the percolation.  This method has been used in the past. ther are alot of other things to experiment with.
Thermostats, insulation, airflow, fuel psi, heat blockage plates and even jetting,  and electris fuel pumps.

davis95:

--- Quote from: omaha on March 04, 2011, 01:28:16 PM ---  The tee would be somewhat close to the carb inlet, I think the closer the better.  An electric pump would keep the psi up at idle and would help a little. to a certain extent. The bypass helps keep the fuel circulating, thus relieving some of the heat and the percolation.  This method has been used in the past. ther are alot of other things to experiment with.
Thermostats, insulation, airflow, fuel psi, heat blockage plates and even jetting,  and electris fuel pumps.


--- End quote ---

If I tee into the line before the carb where do I run the hose coming from the tee?

omaha:
The line would run back to the tank. (I know a pain in the A$$).
Im wondering if the choke might have something to do woth the symptoms you are having. When you stomp it cold, is the choke all the way open? (the choke may be "rich-ening" the cold running engine and maybe the engine like this. (I dont know, just a thought @ 3:20 in the morn. 2 much coffee 2 day! LOL!)

Cliff Ruggles:
I've ran into fuel delivery issues hot engine only back when I ran a mechanical fuel pump.

I suspect that the "pull" the mechanical pump puts on the supply line may lower the pressure some, which would also lower the boiling point of the fuel.

This new fuel boils and evaporates easy. 

ALL problems I was having ceased immediately when I sumped the tank and installed an electric pump behind the tank, and 8AN lines/fittings everyplace.....Cliff

davis95:
Looks like it's time for me to uprade to an electric pump. I hear alot of people talking about the 6 psi Carter unit. Where's the best place to get one of these?

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