ok got a weird one here..... my car has a cel on but when the vtec crossover occurs it instantly turns off. as the rpms fall below the crossover point it turns right back on. i have tried to check the codes. when i jump the 2 wire connector under the dash the cel just stays on. it never flashes any codes no matter what i do. i have reset the ecu by unplugging the fuse under the hood and still the same thing. it seems like there may be a grounding issue or something but i dont know??? any ideas on where to look?