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Fuel problem;

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Old 02-04-2015, 05:07 PM
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Fuel problem;

I put a 400 in my 79 Bronco. I replaced the fuel tank, the filter under the truck, new fuel pump. I put a clear glass filter in the line just before the carb. But if the truck sits for a few days the gas goes back down the lines and it takes a while of cranking to get it back to the clear filter and into the carb for it to start. What could be causing this to happen??
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Old 02-04-2015, 06:09 PM
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Fuel pump is supposed to have a check valve to keep it from bleeding back down. Might spend the extra$$ and get a new Holley pump.
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Old 02-04-2015, 07:02 PM
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I've noticed a rattle noise in the front of the motor. Sounds like it is coming from the drivers side. Maybe the new fuel pump isn't any good. But it pumps. Just seems like it has to crank a long time to get the fuel up.
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Old 02-05-2015, 05:03 AM
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Its doubtful but it could be something to do with the eccentric bolted to camshaft that drives the fuel pump.
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Old 02-05-2015, 06:47 PM
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Think I will just put an electric pump on it and forget about it. Cover the fuel pump hole with a plate. I think 10 to 14 psi is about what I need. Am I right?
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Old 02-06-2015, 05:00 AM
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way too much for carb,way too little for f.i. carbed should be between 4-8. depending on carb. I have heard edelbrocks are touchy about fuel pressure.
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