We have a 1988 Gen 2 Rx7. The original engine blew an an apex seal so we ordered a new rebuilt 13B. The wire harness was removed completely from the car and then dressed on the new engine. We installed the engine but there was no spark. Theres power to the coils but nothing being put out, and the coils have been checked. So we thought it might be the computer. Replaced that still nothing. Maybe it could be an unplugged wire or blown fuse. No spark. Any Ideas?