Ok need help figuring out what could be wrong with my vtec. I have a 91 hatch with d15b turboed, its dyno tuned and all. My problem is that here last couple of months my loads up right around 4200rpm which where vtec should engage. If i keep it at 0 vacuum and try reving through the gear it sounds like im hitting two step around 4200. and if i smash it it stops but it spits and sputters there the rest of the rpms. i have converted it to obd1 and all wiring is wired right. i have the oil pressure switch grounded to thermostat house with wiring harness ground. soleniod is ran to ecu but the oil pressure that runs from harness is tapped into the soleniod wire just piggy backed off of it. cause when getting it dynoed it kept the throwing cel for oil pressure switch, and that how the tuner ( john kerr) did it. so do u think its the soleniod? who do u test it? also its a p06 converted to vtec by John Kerr.