RS craig 71

hi all, just got my saff back from MSD did an excellent job setting it up, feels so much better than EA setup. just got advisory of stu fuel pump giving 11.12v on idle and 10.25v on boost even though it didn,t affect the required fuel needed for the map he reccomended a rewire, my Q is how do you do it and is it straight forward? many thanks in advance.

saphcossie427

if you can get your hands on a copy of sept'07 fastford it tells you what you need to know/do with pic's

mechanic28

iTrader: (5)

easy enough chap just done mine now got 13.2 at the pump

mechanic28

iTrader: (5)

here u go chap some useful info


https://passionford.com/forum/viewtopic.php?t=174562

Glenn_

iTrader: (1)

I put in a new wire from the fuel pump relay in the car and run the wire down the passenger side of the car. Then through to the boot and though the floor to the pump. I drilled a hole in the spare wheel well and used that as an earth with a 10mm nut n bolt.

RS craig 71

thanks all am i right in saying the pump relay is behind glove box and you have to remove ECU?

Globalgroover

Which is the fuel pump relay and how did you tap into it ??

Gonna try this myself.

kjc300

iTrader: (1)

You really need a fused live STRAIGHT from the battery pos to another relay by the pump, then use the old pump wiring to trigger the relay. This ensures that there is no other drain on the fuel pump wiring (such as crappy old fuse links and dodgy fuseboxes).


Like this....



BUT - I would keep the inertia switch in the OLD circuit!!

jon@work

iTrader: (5)

totally agree - with the exception of running the earth back to the battery, which isn't required, and indeed is worse than creating a new earth near to the pump

rewiring from the original fuel pump relay alone is a waste of time

KSA-Cossie

iTrader: (4)

Quality diagram too m8.

Souleyman

I have a in-tank fuel pump (Walbro) on my Granny Cos 4x4 turbo.
Asked about rewiring on Escorts Cosworth forum, but they are silent.
Have no idea to choose the strong water&fuel-proof connector for the fuel pump and level sensor plate.

Souleyman

Absolutely right about inertia switch!

kjc300

iTrader: (1)

Somebody else did the diagram...

Here it is jiggled around :-

Glenn_

iTrader: (1)

The relay is clipped to the side of the dash on the passenger side. There should be 2 yellow relays and i think there is 2 green relays to. One of the yellow relays is for the engine ecu and the other is for the fuel pump. I made sure i had 12v from the battery to the fuel pump relay. Like i said i found the switched live from the relay to the fuel pump and put a new wire in. I also kept the fuel cut off switch.and like i said i drilled a hole in the spare wheel well and used a bolt and 2 nuts for the earth.

RS craig 71

excellent diagrams! is the inertia switch near the pump and relay in glove box? sorry for being a div!

RS craig 71

cheers for that glennshute .

KSA-Cossie

iTrader: (4)

On late 4x4's the switch is in the passenger footwell,relay is behind glovebox .

AndyPen

iTrader: (24)

PJ did pretty much the same for me - only thing was he used mega wire from a sound system to ensure conductivity - direct from the battery with fuse mounted next to it. The existing system is sent to a relay in the boot, mounted by the jack - so it effectively just acts as a switch for the new wires.

Earth is a short wire and bolted to the body as well.

Works ace and its easy to spot any potential probs

kjc300

iTrader: (1)

You need a NEW seperate relay - forget about the one on the car!!

KSA-Cossie

iTrader: (4)

I used one rated at 40a with a 30a inline fuse.

Globalgroover

I have a big turbo escort, are the relays in the same position on my car or is it a different loom ?

kjc300

iTrader: (1)

The relay in the drawing is a NEW relay, nothing to do with the ones on the car. All that happens is the existing wiring triggers the new relay on the new wire that you have put straight to the battery positive (fused). Thus giving the fuel pump a DIRECT supply from the battery/alternator. This means it's NOT going through all the old shonky wiring / fusebox / relays which are 10-15-20 years old!!

Glenn_

iTrader: (1)

Im not to sure if the escort cossies relays are in the same place. But it wouldn t suprise me if they are in the same place as the sierra cossies.

saph4be

havin a silly moment but what is the inerti switch is this the switch under my spare wheel?

KSA-Cossie

iTrader: (4)

Yes m8.