Hey guys, i have a 2002 200sx and this morning on the way to work I noticed that my car seemed like it hit the rev limiter at around 5500 rpm, the car was running smooth and everything else seemed to running fine. It did it in both 1st and 2nd gear. The car has no engine work and is completely stock apart from blow off valve, turbo back exhaust and a pod filter. Any ideas what it could be? Thanks in advance.