So, heres an interesting problem. Out at the road course today. Car runs fine thru 1-2-3, all the way to redline, makes boost, etc. Go into 4th gear, car will go to 5k rpm / 85mph then its like it hits a speed limiter. go to 5th gear, it will get to 4500 rpm and 105mph but no more.


Already did a boost leak / vaccum leak check
Put new plugs, and a spare coil pack and ign module in tonight when I got home
Reflashed my trifecta ( I have an o6 L61, so sadly thats my only option) tune on the ECM.

Nothing makes a change. This is really bizarre and i can't make heads or tails of it. anyone have ideas?

 

You had it up past this before right?

 

Fuel pump

 

you should be able to hit close to 120mph in 4th, I used to do it on my l61, but my limiter was set to 7300rpm.

 

yea. WOT is saying knock sensor. disabled it, going to test it tonight and see.....

 

hard reset and unplugging the knock sensor didnt fix it.. waiting to see what t
rifecta says next...

 

Post a screenshot of the log showing the issue.

 

How do you do that? I use EZ Flash to data log. I have no idea how to personally view or open those files.

 

im telling you your out of fuel

 

It is the OEM pump. How hard are they to change? Its just weird the AFR was full rich the whole time. Steve just sent me a new tune to try....

 

Dude gets a trifecta response in a day. They are back in action now?

 

While you could possibly be out of fuel as Vaughn mentioned, the E67 used with the L61, has the ability to limit torque vs rpm vs gear, even with a manual trans. So in other words, any gear could be limited to any rpm as desired. Granted this is a trifecta tuned vehicle, so god knows how it's setup. Either way, I'm going with either fueling, or torque limiting in the tuning acting as a rpm/speed limiter.

 

gapped the plugs down a bit and put v4 of the tune on, its a bit better. still limiting out. Whats the best program to use to try and post data logs? I have a trifecta black box cable. but i know you cant view the logs in easy flash

 

HP tuners scanner should be good even if no tuning support you can still log it. Find someone with HP tuners and data log the issue. Post screenshots of the graph showing the issue.

 

Turned out to be the L61's overly sensitive knock sensor and a conservative tune. To make power looks like i will have to keep the knock sensor unplugged. :-\ is there any aftermarket setups for those?

 

I know gizzmo makes one and theres also the knocklink

 

Be careful if that is real knock it is picking up and you run with it unplugged you can kiss your motor goodbye. I wax right though knock safety rev limit.