[ebradway]

A yellow stripe and a 'type R' sticker on the DME really kicks...

I need to look at that board again and see where to bypass the alarm system. The PO of my car never even knew it had an alarm - and didn't have the key. So all it does is add more stuff to fail.

A failing DME can have two possible symptoms: the random dying because of circuit faults cutting power to the fuel pump and o2 sensor or mis-mixed fuel/air because the voltage sent to the 02 sensor. You keep a spare because of the first symptom, but swap with new because of the second.

I'll get back later with how to bypass the alarm.