i have a 99 honda civic si . just rebiult the motor with a b18ls bor out to 81 1/5 with b16b pistons , and a msd coil and a type r ecu , but my rpm gauge is giveing me probs sometimes it works sometimes it dosent when i start it up it will work for alittle but if i push the breaks it goes down to 0 . but when it dose work and when i get on it , it will go up to 5500 thats when vtec kicks in and it will just go down to 0 and not work but the motor keeps going but dosent seem to have much power everything is changed to obd1 so it could be tuned but i cant tune it past 55 cause the rpm shut off and i dont know what its at any clue could help ,