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Old 07-27-2022, 12:35 PM
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Henn28 Henn28 is offline
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Fuel Pump, et al

I spent this morning putting in a fuel pump I had planned to install during the motor swap, but ran out of time. The car was stumbling a bit when starting fully warmed up, and a fuel pressure test indicated fuel pressure was dropping quickly with the key in the off position. I'm hopeful that the pump will fix the problem, as the fuel filter is only a few months old. My first fuel pump install, so thanks to those I bugged here for advice.

I also replaced the "wedge" and nut assembly that holds the battery positive cable on the terminal, as I snapped mine right off when installing the subwoofer a few days ago. I got a used positive cable, including the first foot or so of cable, but replacing the fastener and plastic cover (mine had shattered years ago, which probably contributed to the corrosion that made it snap off with so little torque) was much easier than splicing the ebay cable in.

Fuel pump went in fine and the pressures are good with the key in position 2, motor running and key off after running. The insulation/noise mat on the floor was in 1000 pieces, along with 20 years of kid debris and detritus, so I cleaned it all up, re-taped the wire bundles and put a sheet of Dynamat extreme down. The only struggles I encountered were caused by the middle seatbelt inertial reel being locked (as been for years), which makes it difficult to get the seat/belts, etc. back together again. I have no idea how to replace the center inertial reel, but probably need to figure it out at some point while I can still get a new reel, if needed.

Pics below.
after cleaning up the mess...


After installing the new pump and laying down the Dynamat...
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Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2026 G80 M3 6 spd
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee

Last edited by Henn28; 07-27-2022 at 12:40 PM.
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