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I would check the EGR system. Faulty EGR can cause the NOX to be high. Also if you have too much timing advance can cause elevated NOX.

Bob

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2003 Honda Accord EX
1973 Datsun 240Z

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11-11-2010, 09:30 PM	#2
jedhead Senior Member Join Date: Oct 2009 Posts: 1,078 Tweet	I would check the EGR system. Faulty EGR can cause the NOX to be high. Also if you have too much timing advance can cause elevated NOX. Bob __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. 2003 Honda Accord EX 1973 Datsun 240Z To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.