^^^ What he said.. where did the parts come from, I want to know about the plug wires, too. Make sure those are properly fastened.

In the FSM there is a list of all the fault codes the computer can trip with information on each (how to fix, how fault is detected.) Reviewing this information will help you narrow the problem down - you can eliminate many conditions because all but one possible error was NOT logged.

97 T100 4x4
97 328i
95 540i restoration project