Need advise on launch start problem..

[TomicaGTR]

Hi guys,

I've been thinking quiet sometimes to post this weird issue bcoz really don't know how to put in words. I have dilemma with my E9 where i can't "launch start" due to unknown reason. If i rev the car at certain rpm (not even reach rpm cut off) for launch start it will suddenly bounce back d power. Furthermore it will take quiet sometimes to get back the power. Need to drive a few minutes then it'll become normal. But if i suddenly rev under running condition even with the 1st gear then no problem it can go like normal.

Hope you guys can understand the story and share your experience what could be the reason behind. Not sure also whether E9 is set with launch control but I don't really understand what launch control is all about. Btw i'm using ogura clutch just replaced few months back. Thanks in advance!!

 

[neosa]

800whp...

 

[aycy]

tomica. u are runing with stock ecu? i dont think stock ecu come with launch control. must re-flash it... imo...

 

[TomicaGTR]

I hv reflashed my ecu. Mind to share I've sourced out the reason and this could be the issue.."What u are experiencing is called limp mode. In order to use the 2 step launch the car needs to be sitting still and not moving. With the car in first clutch in rev and it should hit 5500 and bounce for the two step unless it has been changed. If the car is moving or u are in any other gear it will free rev to the limiter and bounce and then the ecu will go into limp mode to protect u from damaging the motor. Its there to keep u from blowing your motor sky high."

Refer to the video it's same case with me
YouTube - Evo IX 5k RPM Launch Control