need help car was jerking

[Arnoldlim]

Hi guys need your help car was jerking when i started the car then the motor died then i started the car again it jerk again then it died so i called bmw road side assistance the guy over the phone told me it going to be 30 t 60 mins wait so i started the car gave it a full rev then its ok now what do you think happend ? im bring the car to the dealer on monday?
pls give me some advice


thanks,
Arnold

[AzNMpower32]

Bad tank of gas perhaps.

[Fastbuck]

Maybe an overload of Horn Moans (hormones)?

[E61Silver]

What model do you have?

[Arnoldlim]

bmw x3 3.0 - 04

[Thunder22]

auto or manual?

sounds like maybe the clutch.

[Arnoldlim]

thanks for reply guys the dealer told me its a bad thank of gas

[sfhondapilot]

Originally Posted by Arnoldlim

thanks for reply guys the dealer told me its a bad thank of gas

and that just proves that you shouldn't believe everything a dealer tells you.

Let me guess at what happened. You tried to start the X3 and let off the key before the motor caught. So, you turned the key back to the start position and the car started. However, when you drove, you noticed that the gear shifts were very abrupt, both upshifting and downshifting. Sound familiar? Turn the car completely off, allow the car to sit, restart the car and all is back to normal?

That pretty much describes a recent experience I had in my 2004 X3 3.0. I tend to believe that an error gets thrown (temporarily) when the car fails to start. The error causes the transmission to shift abruptly. If the car fails to catch on the first start, I now remove the key from the ignition, reinsert the key and then attempt to start the car. Have NOT had the problem, again, after following that procedure.

Of course, you could test this theory be deliberately releasing the key, from the start position, before the engine catches. Then try to start the car (without first removing the key) and see how the tranny performs.

[AzNMpower32]

Interestingly, my X3 does not let me start the vehicle after a failed start; the key will not turn to position III (start/crank). I have to turn the key off, then retry it.

My X3 also doesn't like it when I turn the key too quickly. If I turn from off to crank in one fell swoop, it gets caught off guard since the electrics aren't ready. Thus, I turn it to position II, wait for the auto-leveling headlamps to finish, and then start.