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High NoX, 740T 700 1989

posted by  Brick Skinner on  Wed Jun 27 12:26 CST 2012
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last visit: Fri Jun 13 13:31 CST 2014
[RELATED]

Four years ago, it failed for the same thing. The guy at the shop said he adjusted the AMM somehow (I can't remember what he did). So for three years its passed well within spec's, until now that is. Anyway, that guy is gone now.

A couple of months ago, I fixed a big tear in the intercooler outlet tube and performance and mileage improved considerably. I was concerned that I messed with the emissions by doing that and it looks like I was right. Or was I?

I suppose I could just re-open the tear the way it was, but really, come on now.

Question:
Is there a way to adjust the AMM current? What else should I try?
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