Join Date: Apr 2006
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I had this problem and it ended up being a little road salt on the plug. Bought some electric contact cleaner from the autoparts store, sprayed the plug, let it dry and plugged it in and it didn't trip the GFI anymore. Just some food for thought before you cut the end of to replace the plug.
Early '99 (Built 06/98) F-350 XLT SRW 4x4 Reg. Cab 7.3L 6-speed, AFE Stage II w/ Progaurd 7 Filter, (Pre-Turbo) Pyro and Boost Gauges, MBRP 4" turbo back straight piped, South Bend Con OFE clutch, '01 Headlights, Hella Micro FF Fog and Driving Lights, '06 Travel Tow Mirrors, DP Tuner F5 (Stock, 60T, 80E, 120)