Acceleration Under Load problem

Hi everyone, my truck after 6.0L swap has been running fine for a little over a year. The other day I was working on installing an electric fan system. I ran a 6ga wire w/fuse from a relay to the same terminal on the fuse block for the main battery power source. I ran the ground wire from the fans/relay to a bolt on the frame which shares the negative battery cable and another ground from my wiring harness. Maybe it is coincidence, but after doing all of this my truck doesn't accelerate under load. It idles and starts fine but when I step on the gas it accelerates a little bit then bogs down and barely accelerates until I let off the gas and then it catches back on again and runs okay until I push on the pedal again. I checked the fuel pressure at idle and revving in 'park' and it stays right around 60psi. My next step is going to be getting a longer hose so I can watch the pressure gage from inside the cab while I'm driving. Any ideas on what else the check?

Thanks

maybe you hooked the fan trigger wire to the wrong wire in the harness.

Like red said. I'd suggest removing the harness and...

Okay I did have it going to pin 16 green C2 connector which is 4wd low signal, and I drove around for about 40 min and it everything ran fine. The problem was acting intermitently but I hope this solved it. Time will tell. . . also I'm planning on getting new wires and direct ground wire for my fuel pump in case that had anything to do with this problem.

Thanks,
Danny

Amateurs. :rofl:

Glad you got it worked out. :thumb: