I have a 1994 Honda Civic EX Coupe with a Japanese B18C in it. We changed the clutch and Flywheel over the weekend and then it started Idling funny. We couldn't find what was wrong with it. We reset the ECU and then idled fine. When I drove it on the freeway I was in 5th gear with the throttle down then it suddenly was losing power. The RPMs dropped and I pumped the throttle several times and no response. I down shifted to fourth and then the throttle responded. Went back into 5th and it was fine. Doesn't happen all the time but sometimes happens in 4th gear as well. Would anyone know what the problem is? Please Help