As the title says I have and 89 Civic that will not start (I bought it not starting). I'm getting no spark. I switched the Wiring harness because it was a little sketchy and I was worried I wasn't getting good ground, it ran great for an hour or so then decided not to start again once I shut it off. It's done this a few times now, but it not started more than it has. I also switched the distributor assembly, plugs, wires, main relay and the ecu. Which what I was told were working days before purchase. I checked the g101 ground, removed it and sanded both components clean and replaced tightly. The main relay I got from a salvage yard, I bought 2 extras so I have 3 total that I've switched between. I'm stumped and this thing is getting me down. I just want to drive it again! Thank you for any help!

 

verify coil and icm are good:

Advanced Ignition Troubleshooting - Team Integra Forums - Team Integra

might want to solder a main relay:

Honda Acura Essential Electrical Repair Website. Troubleshooting Main Relay, Coil, Igniter, etc.

more food for thought:

Starting Problems