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#1 |
Registered User
Join Date: Mar 2014
Location: Corvallis, OR
Posts: 712
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How does fuel pump cutoff work?
Hey everyone,
I'm working on wiring on my 72 Jimmy with a 2013 4.8L engine, 6L90e transmission, and e38 ECM. Before I wrap everything up, I am considering putting in an inertial fuel pump cutoff. Like this one: https://www.rockauto.com/en/moreinfo...=10756&jsn=667 But is this even necessary for this setup? My fuel pump relay is triggered by the ECM, so does the ECM disable the fuel pump after a crash? I know the later generations of trucks switch to a Fuel Pump Control Module, but I'm unsure of how my ECM works. Any insight from owners of these trucks or engine swaps would be very helpful. Thank you!
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1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205 1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears 1996 Chevy Suburban K1500 350/4L60E |
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#2 |
Senior Member
![]() Join Date: Dec 1999
Location: Southern California
Posts: 2,802
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Re: How does fuel pump cutoff work?
Might be some other features if in a car with impact sensors and such, cannot say for sure. The most basic feed from the ecm is the fuel pump would be energized for a prime cycle. The ecm would also shut off the fuel pump if the engine is not running.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
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