Hi Ashaman - to clarify, did you let half the reservoir go empty as I suspect I may have? Or just the symptoms are the same? Approximately how many cycles were required to fix?

I still can't see how it went empty, because the fluid I was flushing out was a different colour than the new stuff. I ran a lot through and it all came out clean. Unless I introduced a large air pocket right at the end of it.

No good explanation for how it's operating on vs off though. No one I talk to can explain why it is like it is.

Thanks.

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Daily Drivers:
- 2008 535i, 320,000km
- 2004 X5 4.4, 01/2004 production, 420,000km
- 1997 328i, 350,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2013 Ski-Doo MXZ X 800 E-TEC, trail can
- 2007 Ski-Doo MXZ Blizzard 800 HO
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E