Problem with walboro pump

[charlotte240]

First off, it's a walboro.......pretty standard. I installed it into my RPS13 and my SR ran fine (well, as much as a SR with the maf mounted onto the throttle body can run ). I installed my GReddy FMIC and was going to start the car to set the timing and every time I turn the key forward I blow the fuel pump fuse.

I searched and there seemed to be 2 causes for this.

1) Almost everybody who had this problem had soldered the connections that are inside the fuel tank and when they replaced the soldered connections with butt connectors the problem went away.

2) The wire harness wasn't completely plugged into the ECU. They just turned the bolt and made sure it was snug, and it was good to go.

My attempted solutions:My connections are crimped butt type. I did tighten down the harness into the ECU because the side with the black/pink wire was out a bit, but that did nothing for my problem. I tried to slap a 20A fuse (which blew immediatly) and then a piece of 14G wire in the fuse block because I thought the higher volume pump may require more current. I know, I know, that's how you blow out electrical stuff or start a fire....... sue me. Anyway, the wire started smoking and the cladding melted.

What I'm thinking about doing from here:I'm going to run a line with a switch straight from the pump to the battery. It's ghetto, but it's just for diagnostic purposes. If that works, then I have no idea what to do from there and if it doesn't work I'm going to go in the tank and recheck my crimps on the wires.

Any suggestions???

[charlotte240]

Last night my friend told me that it could be a bad ground. He doesn't do any sort of engine work but he's the man with car stereo and ice. He's had this problem and he said it's always been the ground.

Where does the fuel pump ground out at? I wouldn't think that it grounds out at the tank (that would be kinda stupid in my opinion).

[Hijacker]

i was looking at my harness layout diagram, and it looks like the closest one is in the hatch area next to the hatch anchor/catch. The next one is upstream of the harness at the strut tower, and the next one before that is anchored behind the B-pillar.

[unfrgivn]

i was looking at my harness layout diagram, and it looks like the closest one is in the hatch area next to the hatch anchor/catch. The next one is upstream of the harness at the strut tower, and the next one before that is anchored behind the B-pillar.

Wrong, you can ground it to the chassis, using one of the bolts that hold the fuel pump cover down. Just take a multimeter and test each nut until you find one with a definite ground, but I've been doing this for a year with no problems. If you're batter yis in the trunk b/c of FMIC, then you could also run it to there, but I'm lazy so I leave it on the chassis.

[charlotte240]

yeah, batt is in the trunk.........so right now I've got a switch run. it's ghetto. also, I ran the car for like two min and the switch got really hot so I'm getting a bigger one at the store tomorrow.

where do I go from here? it's obviously something in the wiring somewhere.