i'm wondering if the postion of the fuel pump could cause running issues. mine spits and sputters and doesn't idle consistantly. also lacks some top end power. my fuel pump (from howell, along with the wiring harness) is mounted back by the tank, in front of it, up high. there's that thin little crossmember there where the forward edge of the fuel tank skid and the fuel tank itself bolts up. that's where it's mounted. height wise, it's about even with the top of the tank, maybe slightly above. i think i read somewhere that most guys mount theirs along the frame rail, beside the transfer case, protected by the skid plate. think my running problems could be caused by where the pump is mounted? everything else has been checked and tested, and i mean everything. i'm running out of ideas here...
SOLD! 83 CJ-7. TBI Small Block Chevy 350/TH350/D300, Scout II Dana 44 front, CJ Dana 44 rear. 4" BDS Lift with 35's. Currently Jeepless.
The inline pumps are designed to push fuel so they can't draw it from the tank very well. They rely on the natural siphoning to prevent them from running dry, thats why they need to be as close to the tank and as low as possible. I have mine mounted to the bottom of my tank skid plate. I cut the front off an old snapper mower and made the pump it's own skid plate. Try clamping the pump to the bottom of your skid plate, extend your fuel lines and see if that cures your problem. In my pic, it's the red plate.
Mine is mounted up on the front of the crossmember in front of the tank. I had it orginally under the xfr case skid with one of the fuel filters. when i started having starving problems i moved it back to the crossmember and have not had a problem with it since. (plus i can get to it and the filter much easier) the only other problem i had where i thought it was starving turned out to be that if you go from -6 hose (3/8") to the 5/16" fitting on the tank ( i used a clamp insted of brazing on an -an fitting) it would suck air so i had to reduce it down to the 5/16". THat and i crushed the line on top of the tank between it and a body reinforcment. When i dropped the tank you could see the flat spot in it.
Just a few ideas..
1982 CJ-7 2003 4.3 chevy vortec, 4L60E, Clocked Dana 300 35 x 12.5 x 15 KM2 on Cragar 399's. Vanco Brake Booster. Power steering conversion. Warn front and rear bumpers with swing away. Moser 1 piece rears. Rear OX.
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