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On a car without a cat, timing. (archive)
[ Follow Ups ] [ 3-series (E21) Message Board ] [ Msg. Board FAQ ]
Posted by Robert on September 16, 2001 at 19:19:58:

In Reply to: what makes NOx emissions too high? posted by alan on September 16, 2001 at 19:13:15:

Make sure the timing is set to spec, dwell is proper, and the vac retard and advance are functioning properly.

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