I have a 89 dx hatch with a 95 d16z6 swap in it and was done with all si parts except for the injectors which are from the d16z6, but I needed to modifiy the harness because they are obd1 and everything is wired obd0. Vtec kicks in at 5200. The car is running very slow and the rev limiter kicks in at 6500. Amost any thing can beat it right now which really sucks. I was wondering what could be wrong and what could be done to fix it.