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SeanPlunk · 11-11-2010, 09:16 PM

What would cause a 4cyl Jeep to pass HC, and CO with flying colors, but fail NO at 15mph but not at 25mph. Any ideas? It has a brand new cat (smog legal) that is clearly working for the most part. Help

11-11-2010, 09:16 PM	#1
SeanPlunk Resident Avatar Gambler Join Date: Nov 2006 Posts: 5,997 Tweet	Smog Question. What would cause a 4cyl Jeep to pass HC, and CO with flying colors, but fail NO at 15mph but not at 25mph. Any ideas? It has a brand new cat (smog legal) that is clearly working for the most part. Help __________________ Insanity: doing the same thing over and over again and expecting different results.