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Emissions failed NOx. OBD indicates injectors. Exasperated, nearly $ broke 200 1989

uid 18886's pic
posted by  sdewolfe on  Sat Mar 7 01:04 CST 2009
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last visit: Mon Jan 31 05:56 CST 2011
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Good morning Steve,

As Kentucky said, high NOx indicates an overly lean mixture leaving the tailpipe. An exhaust leak will pull air into the pipe. You must find and repair all exhaust leaks before you can move forward. There is no reason to retest until you do.

The title of your original post says ...ODB indicates injectors.... OBD cannot indicate problems with the injectors. The only thing the ECU knows is that it has responded to the O2 sensor according to the embedded mapping and the O2 sensor is still indicating a problem with the mixture. We do not know whether the mix is lean or rich; only that the O2 sensor is still not satisfied. However, the tailpipe sniffer can tell the difference; you have NOx in the exhaust -- a lean mix.

Get the exhaust leak(s) fixed, clear the code and drive the car for a day or two to see if the codes return before you take it to be tested again.
--
Mr. Shannon DeWolfe -- I've taken to using mister because my name misleads folks on the WWW. I am a 53 year old fat man. ;-)






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