Dude my car started doing the exact same thing today and I have a 90 crx with LS swap. Cruising down the highway, all of a sudden power loss, coast to side of highway, car just shuts off. Have it towed home, start it up and tapping from bottom end. I talked to my dad and he had a car do this once before and it was due to too heavy of oil and extreme cold. Here in Ohio its about 2 degrees for the high without the wind. So im gonna put 5w30 in there and see if it stops. If not its more then likely a rod about to go through the crank/block.