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Old 05-22-2025, 04:21 PM   #19
KingLT1


 
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Drives: 2016 1SS NFG A8
Join Date: Aug 2017
Location: 46804
Posts: 7,665
Quote:
Originally Posted by swisstyphoon View Post
Just went through the same thing recently. I removed my JMS voltage booster when I installed the DSX dual in-tank setup.

The newer JMS units (like the one I had) don’t drain the battery, I measured the draw myself, and it shuts off completely when the car is off, so no parasitic loss.

Ted Jannetty told me I could keep the JMS if you tie it into the second FSCM, or just remove it, either way works depending on how much fuel your setup needs. But then I realized the JMS doesn’t have enough amp output to support both pumps anyway. You’d need the stronger dual-output version for that.

And yes, connecting the red and white wires together will work fine.
If the green LED stays on its drawing power. Might not be much but it's something. I will have to check mine again, but I swore the green light went off after so long.
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2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel
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