Thread: vapor lock 454

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Thanks, Mike.
The pump is brand new and is pretty close to the tank. It is fairly near one of the 3" pipes and its muffler. I will look at lagging everything on the tank side of the pump, and will probably do everything forward to the carb - can't hurt, after all.
Chris

Are you having the same heat wave as europe and russia? Under hood temps maybe higher than normal for you, but moving the fuel lines or insulating may help. Or a regulator and a return to the gas tank to keep the fuel moving.

Just as a test, you could take some insulation (like house insulation)
and wrap it around the fuel line where you think it is exposed to higher
heat. Use some alumninum foil wrapped around the insulation to secure
it....dont compress the insulation too much. That will be a quick experiment
to see if it is heat in a particular spot


another thought...is there a particularly long run of rubber hose in
the system? Rubber hoses should not be longer than perhaps a couple
of feet (British feet is OK). Long runs should be metallic line, never copper.


mike in tucson

Originally Posted by Mikej

...Or a regulator and a return to the gas tank to keep the fuel moving.

^^^this is how I solved this problem with mine... insulating the lines helped to a degree but didn't completely solve it until installing bypass regulator with return to the tank... the cause in my car was poor air circulation in the engine compartment likely due to the absence of inner fender wells but this often happens when fuel line close to exhaust as you described... start with sleeving the line in that area (I use the orange sleeve heat shield material, I don't know what it's called). If you continue to have problems, a bypass regulator will fix it for good.

-Chris