okay, just installed my apex-i vafc today on my 97 prelude base model (h22a4). my car is turbocharged and vtec did work fine before i installed the v-afc. my car is turbocharged with the greddy kit, so i am running the FMU/ bluebox/ fake e-manage they give you with the kit...im just running it along side the vafc. my oil pressure is fine so thats not the problem, also the vtec solenoid is fine...as i said it worked this morning before i installed the vafc and the vafc is installed correctly...to the best of my knowledge but i did buy it used. all that i wanted the vafc for really was a vtec controller and to monitor things (i got a great deal on it). the rpm reading on the vafc is also off from the factory tach, and i have tried setting the vtec x-over at different points on the vafc and it still wont engage. im stumped. if you have any solutions to this let em rip...if ive left out some info let me know....thanks a bunch guys.