Quote:
Originally Posted by nichiolas
My car is NA and has a few bolt on mods: CAI, full HKS exhaust, lightweight pulley, bigger throttle body and etc.
I had my car tuned at a local tuning shop last Dec and brought my car to the track few days after. At the first session, I instantly noticed that the car can't rev over 4K rpm, It acted like as if it was hitting the speed limiter. The RPM hovered around 4K. It kept acting like this and then all of sudden, i was able to rev up. However, I can still feel that th car is reluctant to accelerate between 2.5 to 4K range(above 4K is normal). I then took my car back to my tuner. He put it back on dyno machine and car rev up well. He couldn't find anything wrong with it.
I then drove my car for another few days and noticed that car now could not rev over 2.5k when going up a gentle long slope. It only acts like this when going up slopes as it runs okay at flat surface.
I have never had this issue before the tune. Was wondering does anyone here have similar experience? Does this issue related to the tune itself or it is something else?
Btw, CEL and T/C were not turned on.
Thanks  |
Hmmm the ecu has a failsafe mode were rpm is limited to 4000, but this usually only kicks in if ecu detects a problem with engine or sensor. generally you would expect to get a CEL or traction light with this.
Assume the tuner read the error codes from ecu and found none ?
Put the stock tune back on car and see if you still have same problem.