95eg021085

My problem is very confusing to me.when i driving the car down the road pushing it to the limit, my rev limiter is stopping before 8200 rpm where the engine redlines. it is stopping at 6500 instead. now some history on the car, it was wrecked at 10mph before hand, but no airbags deployed, no check engine light came on, nothing happend to the engine or tranny. I just need to know if i need the ecu reset or if this could be a bigger problem? any help would be appreciated.