Yesterday I swapped out the Ignition Coil, the small wire harness between Ignition Coil and Ignition Control Module (ICM), and the Electronic Control Module (ECM) from my '87 GT parts car. Still no spark. I have the spare distributor also from the '87 GT parts car, which appears to be a newer aftermarket unit. I will swap that out next.
On-board data logging. The ability to alter fuel curves, ignition curves, rev limiters and other engine parameters is the ultimate for fine tuning a performance engine. Ignition Timing Overview: Ignition timing is the point at which the spark plug ignites the fuel in A common problem is when the ECU jumps to the knock maps during tuning.