My 1991 Chevy K1500 4.3 will not start when it gets hot and it has been going on for at least a year. When I let it sit about 20 minutes it seems to start then.
Over the year I have replaced the fuel pump, alternator,water pump, radiator and most of the control modules that sit on top of the intake manafold area. I can start it sometimes with starter fluid or pouring gas into the carb.
Dave
Its vapor locking, losen the fuel cap next time it does it,if you hear a vaccume suction then thats the problem, either leave it a little lose or rplace it
You possibly have a fuel pressure regulator or injector leaking down.
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Thanks for the advice. I have also replaced the carb which had new pressure regulator and injectors. So I know that is not it
I did buy a gas cap yesterday and I hope that does fix it..would love and hate the gas cap to fix it after all the replacements up I have done. I am oriented to the vapor lock solution but do not know for sure. I also was thinking of cutting the metal feed fuel line and placing a rubber hose in the middle?
Dave
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