I bought an ecu from ebay. It was supposed to be an obd1 gsr. When i got it, their was no markings on it. I put it in my 2000 gsr car with wiring harness and i cannot tell if the ecu adds power or not. I cannot even tell if vtec kicks in. It was supposed to be a skunk2 chipped ecu with vtec at 4800. When i have the stock ecu i can feel and hear the vtec. My question is, is it possible that i got an ecu with out vtec? or a single cam vtec?