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High NOs failed ohio emissions test 700

posted by  jchiodi on  Fri Jul 23 09:42 CST 2004
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last visit: Mon Feb 25 11:26 CST 2013
[RELATED]

1985 740gle- failed Ohio emissions with high NO
1950 actual PPM limit 1350 PPM

HC's are low (okay)
72.7 PPM limit 189 PPM



I was thinking that this should be from either air leak in intake or
bad fuel pressure.

the fuel pressure regulator has only about a year on it, and the injectors were cleaned professionally at the same time

but I have not checked the intake areas.

On my 1990 the same problem turned out to be the AMM.

Any other ideas before I dig into it this weekend?
--
1985 740gle na, 1990 740gle 16 valve






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