I've got a 94 civic ex with a GSR swap and when i was driving on the highway the car suddenly started losing all power, it kicked back to life and then about another 10minutes down the road the same thing happened except it did not start back up. I also noticed that during the moments that the car started losing power my air/fuel ratio gauge went blank like this "---" ????? I'm guessing its the main relay, what do you think?

 

i'd start with very basic things.

battery connection (it really helps)

spark plugs, wire, diz

loose key ign

.....

 

I got my battery, msd ignition coil, and sport compact ignition all tested and they work fine. My dizzy is in good condition too..., i get spark too so thats not it