Ok i just bought a 95 integra with a gsr swap it has a chipped ecu but not tuned.whenever you get on it vtec is kicking in at like 4200 which should be 5200. but when i do hit vtec the rpms go all crazy and jumps from 4 to 8 or 9. what could cause that? its like vtec is not kickin in like it should could it be the chipped ecu?