So, I have i 1986 325es that i had swaped an 88i into. it ran and drove supurb before the engine fire after driving over the mountian. so i got a new engine and harness from a 87 cabrio and put it in for the wiring i just matched colors on the c101 because that is what i was told? but even thuogh the engine ran and drove before i put it in my car it is not sparking i have tried changin relays and cap and rotor and ecu and plug wires and coil, spark plugs and crank pos sensor but still no spark any ideas?