Hot wiring the fuel pump.

[*Aaron*]

I have been having a chronic problem with the fuel pump relay and/or the fuse box. Every now and than the truck will randomly decide to not start out of know where. If I pull the relay out of the fuse box wiggle it around a little, clean the terminals, and maybe hit it with a shot of contact cleaner the truck will fire right up and run like a champ until a couple weeks later it decides to not start again. Than the same procedure takes place and back to running like a champ.

I have swapped the relay with another and the problem still occurs.

Im at my wits end with this tiny but annoying problem, unless anyone can see why I should not run power directly to the fuel pump and wire in my own relay, Im planning on doing this tomorrow.

I have done this before in my race car, with zero problems. It is a very common mod to replace the stock power wire with a larger gauge wire to keep the voltage from dropping In the upper RPMS.

Im really just not sure how the Rover will react to this. I know the ecu has some funky coding that tells when to turn the fuel pump on/off and by running a power wire directly to the pump this would by pass all the ecu bullshit that keeps the pump from coming on.

So speak now or forever hold your peace!

Thanks Guys!

[Disco Mike]

First, there is no other relay that you can switch with the Rover relay.
I would initially think you have a crank sensor failing, when this starts, it can keep the ECU from triggering the fuel pump and or not allow the coils to fire.

[*Aaron*]

Originally Posted by Disco Mike

First, there is no other relay that you can switch with the Rover relay.
I would initially think you have a crank sensor failing, when this starts, it can keep the ECU from triggering the fuel pump and or not allow the coils to fire.

Its a brand new crank sensor. I have gone from top to bottom checking/replacing parts and the fix is still to just mess around with the fuel pump relay in the box.

Why can I not bypass the rover relay? What im planning on doing is running a power wire from the battery to an inline fuse, than back to the fuel pump where Im going to wire in my owner aftermarket relay.

Basically im doing this but to the rover.
2G DSM FWD Fuel Pump Rewire Instructions

I know Im going to be able to turn the pump on/off with the ignition like stock, what im trying to figure out is if there are any hidden troubles that may lie in the ecu as the cars have a bit more fail safes built into the ecu ,that I may not know about, compared to a DSM ecu which I know back to front.

[mbrummal]

You can do that like the link does. The only thing I would suggest is putting the relay in the engine bay and using a fuse rated the same as the current one.


This still uses the ECU to turn it on so there shouldn't be any safety issues from that.

If I was doing this, I would try to use the stock wiring. Get the rave manual and figure out were the wires for the fuel pump are and tap into them.



I'm pretty sure a new relay would be cheaper than a new relay, wiring, fuse holder....

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