Progress report--I Got the codes!
I pulled codes the other night. Code 6 (Idle speed control inoperative) and Code 7 (Ignition system failure) To read the detailed codes I built Arthur Dalton's very cool code reading tool this morning. Parts now cost $8 at Radio Shack. With expert coaching, I got code 23 off Pin 8, indicating the resistor boots under the coils are at fault. (Also got codes 3 and 14 off Pin 14, which I'm told could be related to the coils). I am now waiting for parts.
I can't believe how easy the codes are to read!! Thanks again, especially to Arthur.
94 E320 Wagon, 170k, totalled in 2006
2002 BMW 525i Wagon, 75k
1991 BMW 318is (two of 'em)