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95 Cherokee high NOX
My 95 Cherokee failed the Ohio emissions test due to high NOX reading.
HC, CO, and CO2 all all well within limits. Combustion temp is supposidly high. I have looked for the EGR valve as shown in my Haynes manual but find nothing which looks like the pictures shown. Does this inline 6 with fuel injection have an EGR valve? If so, where is it located? Think I'm on the right track with this diagnosis? It has 211,000 miles but runs great, uses no oil between changes and seems fine otherwise.
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