Launch control disengaging when flooring the gas pedal

[JuanDeLaMora]

Hi all,

I'm tuning a B16B motor with 661 WHP it has an aftermarket wire harness and it does not have Velocity Sensor.

I wired the vtec pressure switch with a push button to engage the launch control, and if I press it, it does engage as long as I don't go further than 25% of the gas pedal, but if I floor it, it goes all the way up with the RPM to 9000 like there was no launch control set.

Is there anything missing here? there is no clutch switch also as the aftermarket harness does not have it, it has empty slots from B3 to B9 connector.

Thanks for reading, any help is appreciate it.

[Spunkster]

What do you mean by a velocity sensor?

Can you post your calibration and a datalog showing the issue?

[JuanDeLaMora]

Sure I’ll post them tomorrow, and by velocity sensor I mean the VSS or speed sensor as I get 0 mph in the log

[Spunkster]

You need to have a working VSS for this to work properly.