So I cooked the 325is motor in my 87 e30, swapped in a spare and now I don't have a working tach, plus the motor is acting like it can't advance the spark. A few more mystery details: 1. I swapped the instrument cluster at the same time, so not sure if my tach is dead in the cluster 2. In a fit of stupidity and rage, I pulled the old head off the blown motor (with intake and exhaust manifold attaches) and chucked it to the recycler, with the BRAND NEW spark plug wires on it. So the current motor is running some very old wires, and the tach signal wire is a totally different color, so it COULD be a replacement or who knows. 3. New spark plug wires are $$$$, so I wanna make sure they are the issue before I buy a new set.
Soooo, how do I check this out? This would appear to be the rarest damn e30 problem ever since all my usual web sources have nothing listed, and even google failed me.
