I just got a walbro 255lph and nelsons wiring harness for it, but I dont know where to hook up the wire that says fuel relay/ecu. Any ideas?

 

Fuel pump relay is in the under hood fuse box. Are you looking for the fuel pump power wire, or the wire that turns the relay on? Did the kit come with it's own relay(s)?

Dave

 

The gray wire from the nelson harness goes to the gray wire that is under the fuse panel that is in the engine bay. Watch out because there is more than one gray wire. You can test it with a test light. Hook the test light up to the gray wire then have someone turn the ignition to the on position NOT the start position. It should show power and you will here the OEM fuel pump come on for about a second or two then go off. The gray wire will be to the fire wall side of the fuse box. You will have to remove the corner brace, top of fuse box ,then the surrounding fuse box cover.
Check out this post of mine if you want part #s to hard plumb wabro in-line
link

 

Thanks, I used the hard wire plumbing earlier. That info was great!!! It was a little different because I have a short bed single cab and my fuel filter is right next to my cross member but I made it work. After I tested all of the wires mine wound up being a green wire with a white stripe, but I came right off of the backside of the ECU wires. Also the wire from the nelson harness was light green, almost teal. Thanks for all of the help guys!! I love this place!

 

I also have the 225 how did you adapt the stock fuel line from the filter to goto the new pump? They are different sizes

 

Click on the word (link) that is above the picture that I posted above. All the part #s and how to are in that thread.

 

I have the 4X4 so I ain't got half of the room that you got in the picture with the crossmember and some sort of black(muddy)electrical box. I was almost thinking of splicing into the line further towards the enging?