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745T-5.0 HO Tune up time- advice please ?

posted by  wongg3 on  Mon Feb 11 22:49 CST 2013
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last visit: Tue Oct 21 20:12 CST 2014
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Quick reply here, gotta go to bed-

NOx, means oxides of nitrogen. Typically a result of too high combustion temperatures. That could be because ignition timing is too far advanced. Could be because EGR is not operating right. There are probably other causes, too. I don't know if the O2 sensors will affect that, but they do affect mixture, so probably.

Sounds like you need a basic tune up to base specs, and then go from there.
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