Fuel Pump Power Feed, Sensor? Help Me Drrrrift Cheers

[EZSLDR]

Hey guys

Ive just upgraded to a walbro pump to my surprise was a no name pump in it with power going to earth and earth goin to power, some how it worked, but now it doesnt power my walbro the positive is not geting power so i suspect dodgy wiring somewhere as it has been repowered with a 25det

but

im going to run a straight feed to the battery in the boot with a relay, what i want to know is can i 'tap' into the sensor power wire which goes to the fuel pump to trigger the relay? or upon starting does the sensor wire lose its power

cheers in advance im new to this shit

[Bick033]

You should have an earth from the ecu to the fuel pump relay (on my gts4 it was in the boot not sure if it's the same) to switch it when running. It's easy enough to just use a new relay to rule out bad wiring plus up rate it a bit. Using the ecu signal to pin 85,battery positive to pin 30 and 86,then 87 is your positive to your fuel pump then just make sure you have a good earth for the fuel pump.

[EZSLDR]

sorry forgot to mention its an r32, ive got a relay wired up already earth straight to the battery same as power i really just want to know what wire i can get away with to use(in the boot) as the power that goes from the car to the relay, maybe i could use a power wire that is in the plug that goes to the original relay?

[scotty nm35]

A walbro will still work with the power around the wrong way, the pump will simply run backwards and not pump fuel. I would be checking the fuses first.

[EZSLDR]

yea thats what it was doing at first swap the wires around and it doesnt go

[EZSLDR]

checked all fuses under drivers side dash and they are all ok

[ARTZ]

Search dude there is 14 page thread on this in tutorials...will tell you exaclty which wire to tap out to switch your relay....also earth just goes to chassis, no need to go to battery..

[EZSLDR]

yea i read that its great but my power wire to tap into doesnt have power was just wondering if i could use another source as the power trigger feed

[Tonks]

You should have power at the old 12v feed for the pump.

You might have another issue.

[ARTZ]

yea i read that its great but my power wire to tap into doesnt have power was just wondering if i could use another source as the power trigger feed

have you tried/tested it? it wont have power unless car is switched on

[EZSLDR]

yep had the key in on position and tested it had nothing, checked the fuse and its fine its got me stumped

[Ben C34]

Fuel p up only primes for a few seconds when you turn key on.

Have you never noticed that in all efi cars ever?

[EZSLDR]

Fxck really? maybe thats where i'm going wrong.........

[Ben C34]

Sounds like it!