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Old 09-09-2012, 07:57 PM   #1
pdawg
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Fuel Pump question

I'm installing a ZZ383 crate engine into my 72 Chev Custom Deluxe and noticed the high output Holley fuel pump has only an inlet & outlet while my original has a third. What do I do with the third and what's it for? Thanks!
Perry
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Old 09-09-2012, 08:31 PM   #2
geezer#99
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Re: Fuel Pump question

The third was for a return line to your tank. Your truck might not of had a return line originally. Was the third one capped or plugged off?
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Old 09-09-2012, 08:37 PM   #3
pdawg
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Re: Fuel Pump question

The third line was connected to the stock fuel pump. I thought only fuel injected had return lines but I'm a rookie.
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Old 09-09-2012, 09:01 PM   #4
geezer#99
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Re: Fuel Pump question

If you're using the new holley pump you should cap off the line back to your tank.
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Old 09-10-2012, 10:53 AM   #5
pdawg
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Re: Fuel Pump question

I'll do that. Thanks so much!!
Perry
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