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High NOX failing emissions 200 1987

posted by  tdonnelly on  Mon Mar 1 12:05 CST 2010
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last visit: Tue Nov 29 22:09 CST 2011
[RELATED]

Readings
O2 HC CO NO
15mph .4 24 .00 2716
25mph .4 22 .00 2760

Please help, i have checked for vacuum leaks, intake manifold cracks or leaks, exhaust manifold leaks. nothing. still runs hot and lean.
since last test, have changed O2 sensor, thermostat, and distributor cap/rotor. Cat is 1 yr old. Please help, checking fuel pressure today or tomorrow. Not sure what else to look into.

thanks






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