I have a 1999 Accord EX 4cyl VTEC that has what I would describe as a miss. It appears at speeds >45MPH. The engine never has trouble starting, runs smooth, shifts smooth, and doesn't show any engine trouble codes. The issue feels like an engine miss and is not a constant pattern but consistently there. There are no gauge fluctuations during the miss. I have replaced the timing belt, plugs, wires, distr. cap, rotor, coil, ohm checked the VTEC oil pressure switch, checked the o-ring and filter behind the o-ring, ohm checked the transmission solenoids, jumper tested the transmission solenoids. Looking for suggestions.