Join Date: Jul 2011
Location: Cologne, Germany
I can't imagine a bad coil only sparking on 1&4.
However, if the spark you are getting is weak, and not crisp & bright, then swop in the coil from the 89.....easy test to eliminate that one.
did you try swopping lead 1 & 2 in the dizzy cap?.....did the no-spark follow?
you say you put the flywheel in "by the book", so we can be assured you used the factory timing mark, and not some previous mechanic's paint mark on the flywheel, correct?
Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.