Sometimes when I launch the car from standstill, shift the gear to 1st, push the gas pedal, the whole car vibrate.Putit in 2nd, it will stop.I remember when I was test driving the BMW Z4, the same happened when I put it in sport mode.

Is that due to the electronic throttle being sensitive? Anyone has this ever happened to you?

 

what do you mean vibrate? describe it.

 

R u getting wheel hop from the hard launch....vibrating the whole car?

 

you have wheel hop....time to upgrade suspension!

taking tcs off helps too!

 

that's what i was thinking. That's most likely the case. because it stops when he shifts to 2nd.

Pick up some of these

 

I had it bad at sotck when I got on it. I just have springs now but the wheel hop is gone. I am not sure what took care of it actually cause i got the new springs, 18" and CAI and tune at the same time....

 

No, I'm not talking about wheel hop, it's the car moving up and down, not the wheel vibrates. I think it's the electronic trottle being sensitive.

Sometimes if I launch the car badly, the whole car acts like crazy. It's like the trottle being cut off every 1/2 second, it goes like this: Vroom...Vroom...Vroom...., put it to 2nd, it goes away.

Has something like ever this happened to you?

 

Are you turning TCS off????

 

It's on. I don't usuallyturn off TCS in normal driving.

 

sounds like tcs is kicking in. turn it off and see if it continues.