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E36 M3 (1995-1999)

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Old 09-07-2019, 03:14 PM
austinfausett austinfausett is offline
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Mein Auto:
Fuel pump relay fail - electrical fire

I recently completed a s50 intake swap with a tune, Bosch 803 MAF, and 24# injectors.
The car was running great and we were happy with the upgrade. I had some cold start issues that I was troubleshooting with my intake temp sensor. after the cold start program was over the car ran great!

I had picked up a misfire while driving home last week and the car started to sputter. I limped the car home and started troubleshooting the issue.
I replaced the fuel pump relay and when I did, I discovered melted wires in the loom going from the DME (passenger side) to the fuse block (drivers side).
Pictures attached.
The wire is completely lacking covering and has been grounded out. After further inspection the wiring is melted clear across the car in some places melted and broken apart.

Has anyone experienced a similar situation? I believe I need to replace the wiring from the fuse block all the way to the dme and see if I can make the repair.

I did check the fuel pump, the fuel filter, and replaced all coil packs before finding the melted wires in the fuse box. Click image for larger version

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Last edited by austinfausett; 09-07-2019 at 03:39 PM.
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