About a week ago I noticed that my rev limiter had stopped engaging while on the dyno. I haven't hit limiter since last test and tune at the track 2 weeks ago, so it may have stopped working within the past two weeks, but it was news for me on the dyno However, launch control will engage perfectly fine. I assumed it was a glitch in Crome, but we couldn't get past it. I tried different laptops, switching ostriches, burning to a chip from the ostrich, trying my old map, making a new map and almost any idea in between, and even a different ECU. I just installed a new dizzy tonight because I figured that there had to be lack of signal somewhere, but still have the same issue. Tach, speedo, etc works fine. Launch control is fine also, but rev limiter will not engage no matter where I set it at. Wiring looks perfectly fine, as the harness is virtually untouched.

 

So you are able to over rev? That's basically what you are saying? Or are you trying to set up some form of boost cut? Seems like you've tried a lot of stuff. What are you using to determine the RPM? Dash? Have you tried an external gauge?

 

I have seen the 2step limit override the main limiter... double check that.

 

Exactly its def related to the calibration. Set the rpm values low so you can test the function without having to rev to the moon.

 

if you're using full throttle shift check your TPS values and the clutch input signal. if it's just straight up not rev limiting when you miss a gear or miss your shift point, you may have a faulty ground or a bad rom.