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Fuel pump will not run unless bypassed . - Cars & Trucks

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Check the fuse box under the hood for fuel pump fuses. THen check to see if you have double tanks on this truck if the switchover is working on either pump. If not, check to see if you have power to the switch.

Posted on Dec 31, 2012

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SOURCE: Power to fuel pump on 91 ford mustang cobra 5.0

The ignition module sends a "pip" signal to turn on the fuel pump and keep it running. If the signal is lost, or not present you get no pump. This is a safety in case of accident or other hazard in order to shut off the fuel so it wont keep pumping into a car with the key still on but engine disabled for some reason. Take the module to your local parts store and have it tested, for free to check.

Posted on Sep 30, 2009

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Bought replacement ignition barrel and keys. Told that I can bypass transponder with wrire to fuel pump cutting away black box and energising fuel pump without damage.


Year make and model?? I am assuming the box is the fuel pressure control module. But when you bypass it, it will make the pump run at full pressure all the time. Your fuel mileage will go down. Again, you can not bypass security. I can get a fuel pump to run. Different power points. usually the security will kill the fuel pump and injectors. The injectors are grounded to fire from the PCM. good luck on bypassing them. ASD comes in to play.

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Why does my 2012 dodge ram 1500 fuel pump stay on...


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1 Answer

Will a 1989 chevy c1500 run with the fuel punp relay unpluged


Not unless you bypass it so the pump gets power.

Dec 05, 2015 | 1989 Chevrolet C1500

1 Answer

Move fuel pump inside van to auxilery tank for demo derby, van wont run unless use starting fluid


Does pump run? Does it give correct fuel pressure? Are you still using low oil pressure kill switch with bypass for starting?

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1 Answer

How To bypass the Fuel Pump Relay


Don't bypass the fuel pump relay . power to the relay comes from the ignition switch on start cycle .when the engine is running the oil pressure switch takes over the circuit .so if you crash and the engine .stops so does the pump . If the fuel line brakes a bypassed pump will keep pumping spraying fuel and you could burn.

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1 Answer

My 2000 ford expoler 4.0 dohc won't start fuel pump won't come on mabe my anti-theft how do i check that


Drop the tank and on top of the tank where the wires go is a special sort of electrical gizmo that will not allow the pump to work unless it gets the right frequency signal so just bypass it and run the wires direct onto the fuel pump --sorted--

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When i go from the rear tank to the front one it still running on rear tank?ss


Shouldn't be unless the selector valve gate is worn and allowing the fuel to bypass.

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My 95 camry won't cold start unless I use starter fluid a couple of times then low rpms til warm up then runs find. Checked spark,iac,throttleprosition,changed fuel pressure bypass


Maybe needs new fuel filter, possibly new fuel pump. Check fuel pressure, low fuel pressure would indicate a problem with fuel filter or fuel pump. If fuel pressure is sufficient, fuel injectors may be shot. Use a stethoscope, or screwdriver, to listen to each injector to check for a clicking sound, signaling that the injector is operating.

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Fuel pressure regulator makes hissing sound


your fuel pump should cycle on until the proper fuel pressure is achieved then it should shut off

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