Hello, I have a 429 cid in a 52 F1 and having trouble I can't understand. After about 20 minutes of driving, the engine seems to get hotter than normal then the engine stops. I thought it could be vapor lock cause the temp on my temp gauge goes to 220 and when I stepped on the gas to climb a hill, that is when the engine gasps for fuel and stops. But, I open the hood and look at my fuel pressure gauge which is in the fuel line, it reads ZERO pressure. The fuel pressure gauge is mounted to the firewall above the steering column. Normally it reads 5-6 pounds in the garage. Can someone tell me if vapor lock would make the fuel pressure gauge shows ZERO, or does that mean I have no pressure from my electric fuel pump residing in the back mounted to the frame? After the engine cools down for 3-5 minutes I can start the engine and if I don't floor the gas pedal, at least get it home to scratch my head again and ask this forum for help. My fuel line from the carb to the fuel pressure gauge is already insulated from heat, (I think, at least it is covered with 2000 deg. insulation) . <!-- / message -->
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Normaly you have that problem with a stock type mechanical fuel pump. Install a return fuel line on your truck much smaller than your fuel line as it will cool your fuel down a lot. 1/8'' copper line will work just fine but make sure you have enough fuel pressure and volume. Sometimes you may have to restrict the fuels return. They sell fuel filters with a return port already on them try one of those first before custom making one. Mopar's had them as well as other makers. Cooling the fuel up to the carb will help you big time. Been there done that!