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EFI wiring question: (-) coil input to ecu, where? 200 1987

posted by  rob02 on  Tue Oct 17 09:55 CST 2006
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last visit: Fri Jul 6 16:13 CST 2007
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I'm retrofitting the EFI setup/wiring from this junkyard '87 volvo to my BMW 2002. The problem I'm having is that I didn't get the coil wiring with the EFI harness. From pictures of 240s and from my memories, I can only recollect that the coil wires went down into some abyss, and I can't figure out where they go from my Bentley wire diagrams. I basically need an rpm input from my coil to the ecu, but can't tell where it should go. Any help?

From my EFI harness, the only empty connectors I have are:
The big grey rectangle one from the firewall that has 4 wires: red, yellow, black and yellow/blue wire in it
The black one from under the intake with 2 wires: greyish or tan-ish and orange wires in it
Grey one from inside passenger compartment next to ecu with 4 wires: red, red/black, white/black, yellow/red

could it be any of these above wires?





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