Fuel pump wont shut off
Thread Starter
Junior Member
Joined: Oct 2025
Posts: 11
Likes: 0
Car: 92 RS- hardtop
Engine: 350
Transmission: 700R…for now
Axle/Gears: 4.10
Fuel pump wont shut off
I converted my car to 4 barrell last year and now I have a problem with the fuel pump running at all times unless I unlug the oil pressure sensor, pull battery cables or pull the fuse for the fuel relay…..anything helps!!
Joined: Jul 2011
Posts: 358
Likes: 91
From: Tampa, FL
Car: 15 Ram, 88 IROC, 92 RS
Engine: 5.0
Transmission: Auto
Axle/Gears: 3.42 (4th Gen)
Re: Fuel pump wont shut off
It sounds like you have a failed oil pressure switch. The contacts on that switch are normally open, and only close above 5psi of pressure. Replace that and re evaluate
Thread Starter
Junior Member
Joined: Oct 2025
Posts: 11
Likes: 0
Car: 92 RS- hardtop
Engine: 350
Transmission: 700R…for now
Axle/Gears: 4.10
Junior Member
Joined: Jan 2025
Posts: 58
Likes: 9
From: Virginia
Car: 1989 Camaro Iroc-Z Z28
Engine: L98
Transmission: 700r4
Axle/Gears: 2.77 G80
Re: Fuel pump wont shut off
What about the relay? Can even try tapping on it. Could be stuck closed... Maybe even an exposed wire somewhere. A repair manual would have the diagram and check procedures.
Good luck to you brother ✊
Good luck to you brother ✊
Last edited by RottenThomas; Nov 18, 2025 at 03:03 PM.
Joined: Sep 2005
Posts: 27,861
Likes: 2,427
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Fuel pump wont shut off
That part is brand new.
If it's messed up, doesn't matter too much how new it is.
Replace it.
Joined: Sep 2005
Posts: 27,861
Likes: 2,427
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Fuel pump wont shut off
Indeed. Might even be the wrong one, somehow. Can't imagine how butt you know how that goes. 
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Thread Starter
Junior Member
Joined: Oct 2025
Posts: 11
Likes: 0
Car: 92 RS- hardtop
Engine: 350
Transmission: 700R…for now
Axle/Gears: 4.10
Re: Fuel pump wont shut off
I replaced it with a new one and same thing. Got some new relays, same result..... now on to chasing wires and maybe even changing the pig tail for the oil sensor.
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