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CA emission test. (archive)
[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]
Posted by James on July 08, 2001 at 23:15:57:

Is there a way to retard ignition timing on 94 525ia? I need to do this just to pass CA emission test. It had high HC 170 ( spec=100 ppm )at idle. It has new spark plugs, and air filter already. I don't think that O2 sensor is the problem because CO for both Idle and Cruise is way below spec. On older car, if I just retard Ignition to lower end of spec, I know it will pass with no problem.
Any and all suggestions welcome.

TIA
James.

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