Re: Z3 sputtering upon engine warning light activation

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Z3 sputtering upon engine warning light activation

Z3ster

27 Sep 2006 16:57

Yesterday when starting up my 2000 Z3 (3 hours since last running) The
"check engine" light, the EML light (electronic engine output), and the
ASC+T light remained illuminated and the engine began running extremely
rough. It seemed like 2 or 3 cylinders were variously misfiring. Not
100% continuously, but frequent enough to severely limit any
acceleration, and provide not even enough power to hold 50 mph. I
barely made it home. After cooling its jets in my garage for an hour I
restarted it and the EML & ASC+T turned off, but the check engine light
stayed on. However, the sputterring and misfiring completely stopped.

This Z3 has only 25,000 miles, but I know things happen prematurely.
Question is, WHAT is happening?? I have not yet taken it in to have the
fault codes read, but plan to.

So what do you think-?
- Oxygen sensors?
- emissions modules?
- ignition controls (??)
What?

Jerry

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