well i need help making my hx motor run better i currenty have it in a 92 hatch its running on a p28 right now and it is so slow because the vtec c/o thing on the hx motor it bogs then when normal vtec kicks in the motor runs fast but i was wondering if i hook up a vafc or uberdata the p28 is that better than running the stock p2n ecu. The egr valve is not hooked up and the o2 sensor is not the normal 5 wire hook up any info would be great i already asked bense but havent heard from him and i've searced the threads i think pretty good let me know if anybody out there is running the d16y5 with the stock ecu without the egr hooked up and the o2 not being 5 wire or if you are using the p28 with some kind of vtec controller to make it kick in close to 2500 rpm the stock setting on the stock hx