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High NOX emissions: What are we gonna do? (archive)
[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Posted by Pierre on December 21, 1999 at 09:52:31:

As I cannot get my euro 635 (with CAT) thru the 2 speed VA emissions because of the high nitrogen oxides (NOX), I am hearing evermore stories about older Bimmers with the M30 big sixes and M10 4 cyls blowing too high NOX at lower rpms (less than 1500). At 2300 rpms the NOX falls to passing levels (about 990 ppm), but the treadmill machine wont let the operators keep the rpms that high in the 15 mph stage, so FAIL is the result.

Are there any ways to beat this predicament (desides registering the cars out of state) or are we hosed for good ?

Any help is appreciateds

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