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Old 07-26-2017, 10:08 AM   #1
carnut$
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Join Date: Jul 2017
Location: Morgantown, IN
Posts: 3
Stock C10 tank w/ efi

I installed a '94 LT1 EFI 350 into my '71 shortbed. I'm using the stock behind the seat fuel tank w/eec. I'm running and external FI pump. I've plumbed the pressure side from the stock (single line) sending unit, and the low pressure return through the passenger side/top tank tube. I'm wondering if my vented gas cap is "breathing" enough. Sometimes the truck will rpm surge & sometimes even die, making me wonder if it's vapor locking.
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