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Registered
Join Date: May 2002
Location: Santa Barbara, CA
Posts: 4,821
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If the black 0.75mm wire was shorted to one of the red wires for a prolonged time you have likely damaged your DME. Specifically the fuel injector driver. As a result your mixture is off. The black wire is the shift light output and extremely sensitive to feeding in an external signal.
I recommend getting your DME checked out or doing a swap test.
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1974 Targa 3.6, 2001 C4 (sold), 2019 GT3RS, 2000 ML430
I repair/rebuild Bosch CDI Boxes and Porsche Motronic DMEs
Porsche "Hammer" or Porsche PST2, PIWIS III - I can help!!
How about a NoBadDays DualChip for 964 or '95 993
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