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Original Message
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| Vapor Lock |
| By Greg - 03/07/2004 9:04:47 PM; IP 65.33.239.188 |
I am new to this forum and any help will be greatly appreciated. I have recently purchaced a 68 Mustang 'Resto-Mod' and have been having a problem that's getting progressively worse as the weather gets warmer. When the water temp gets to around 180 the car starts to run very rough and eventually will die. The car will run fine after it cools off until the next episode. I have a Mallory 110 electric fuel pump and filter installed at the fuel tank and the normal pressure at the carb pressure gage is 7psi. The last time the car quit I left the key on to keep the pump running and opened the hood to check the fuel pressure. The gage was reading 6psi but was fluctuating quite a bit. I watched in amazement as the pressure slowly dropped from 6 down to 0psi and the water temp was still only 190. I let the car cool for about 20 minutes and turned the pump back on and the pressure was a steady 7psi again. Is this how vapor lock indicates on a pressure gage or do I have a fuel pump that is failing? I have been told that with an electric fuel pump you should not have any vapor lock problems. To date I have replaced the fuel filter, replaced the fuel line with steel braided and a pressure gage, installed a phenolic carb spacer and replaced the coil thinking it could be an electrical problem. Any ideas? Thanks in advance for any suggestions or coments.
Greg |
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