1997 BMW Z3 BMW Z3 1.9 M/T Stalling at high speed/high rpm

This could take some back and forth between us to figure out. The first thing that comes to my mind is ignition, perhaps coils or spark plug caps, or a cam/crankshaft sensor, that version of Motronic has some weird issues from time to time. Faults not currently present can be real hair pullers. I will sleep on it and see if something shows up, it's been a very long day today.

[quote:0b1287edd9="Dr. Hagerty"]This could take some back and forth between us to figure out. The first thing that comes to my mind is ignition, perhaps coils or spark plug caps, or a cam/crankshaft sensor, that version of Motronic has some weird issues from time to time. Faults not currently present can be real hair pullers. I will sleep on it and see if something shows up, it's been a very long day today.[/quote:0b1287edd9]

Thanks. I hope you'll come up with ideas. Probably I'll start with changing the sparkplug wires since these are fairly cheap. And will go on from there.
I will appreceiate it very much any ideas that you can give. Is it possible that I am just bumping on the speed limiter at 180kph?

Thanks. again.

6000 rpm is the maximum sustained engine speed and yes it is possible you are hitting the limiter, funny what being tired does to the mind. There are aftermarket suppliers that can assist in raising the limiter, I will see if I can do a bit of digging on this end.

[quote:7cd0ffeebe="Dr. Hagerty"]6000 rpm is the maximum sustained engine speed and yes it is possible you are hitting the limiter, funny what being tired does to the mind. There are aftermarket suppliers that can assist in raising the limiter, I will see if I can do a bit of digging on this end.[/quote:7cd0ffeebe]

Thanks for the reply. I will try to duplicate the issue this weekend and try to rev the rpm above 5000 in each gear and see if the issue will happen consistently on all gears and on how high is the rpm when it happens. Will post results here so that you can give your opinions.

Thanks again, I appreciate all your efforts.

By the way, can I rule out the possibility of a failing fuel pump? And since I dont get any CEL, can I also rule out defective cat converter?

A fuel pump failure is going to set misfire faults, cat failures will set faults. Plugged cats on OBDII cars usually mean a flashing CEL

Hi,

I have tested the car today and was able to isolate the occurence of the issue. The power cutoff/misfire only happens after I reached the redline(6500) on any gear and 180kph. Then when I turned off the engine and started it again, car will run fine again.
Car runs fine all the way if avoid reaching the redline in any gear and 180kph.

Am I just bumping on the rev/speed limiter and I dont have to worry about anything?

By the way my z3 is a Japanese version.

thanks.

Am I just bumping on the rev/speed limiter and I dont have to worry about anything?


You are. You dont.

[quote:f0ed88c7d7="Dr. Hagerty"]Am I just bumping on the rev/speed limiter and I dont have to worry about anything?


You are. You dont.[/quote:f0ed88c7d7]

Thank you very much. Now I can sleep peacefully. :)

Thanks again! I love this site!

Hi

One last question, when this happens my instinct is to shutoff the engine and re-start. Do I need to do this? Or should I just continue to drive with the engine running rough and it will automatically run normal again?

What if a re-start is needed to make it run fine again? Then I have a problem? Oh no..back to testing again?

Thanks.

How about not ringing that little cars' neck every time you drive it. Would that work?

[quote:52bf10a4db="Dr. Hagerty"]How about not ringing that little cars' neck every time you drive it. Would that work?[/quote:52bf10a4db]

Actually, I really don't usually drive that fast. I just want to make sure that there's nothing wrong with the car and I would not encounter any surprises during driving.

Thank you very much for your help. I really appreciate it a lot.