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Old 01-29-2012, 08:05 PM
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fuel delivery problem on older 350 chevy

Here it is; I have put a chevy 350 in my 56 chv truck. I can start it cold just fine. It will sit and idle all day with a full fuel filter. I take it down the road and make it about 3 mile. Then theres no gas being pumped. let it set a while start it up ,same thing. Now I can be under the hood and hold the accelerator and it does thesame thing after a couple minutes. When its warm its harder to start.It has a edelbrock 600 with edelbrock intake . Clean used factory tank, i've tried three manual fuel pumps,replace the parts of the fuel line that were bad, changed the fuel filter, It has me pretty bewildered.

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Old 01-29-2012, 08:46 PM
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try it again with the gas cap off.
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Old 01-29-2012, 09:30 PM
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X2. Sounds like vapor lock.
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Old 01-30-2012, 08:16 AM
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Ayuh,... Look for a vacuum leak between the tank, 'n the fuel pump...
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Old 01-30-2012, 03:53 PM
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Make sure that the pickup tube on the sending unit doesn't have a sock or filter on the end. If so remove it and try it again. If that fixes it install a inline filter elsewhere in the system. For that matter check all the filter your system may have.
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Old 01-30-2012, 04:06 PM
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Partially plugged fuel line somewhere so the supply cant keep up with the demand. Check for a kinked line somewhere or a long run of rubber line. I have also seen a plugged pickup do this. You can remove the line from teh pump and blow compressed air back through the line.

Have you checked the fuel pressure at idle and at 3K rpm?
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Old 01-31-2012, 08:14 PM
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Hey , thanks for the info. I just replaced the whole line and it worked. I believe it was pluged at the pressure fitting. thanks again
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