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  1. Failed Smog Test

    Jeep Grand Cherokee Lounge-ZJ/WJ
    So here is the run down for everyone, I purchased a 94 Jeep Grand Cherokee Laredo with 260*** miles on it. It has a straight 6, auto, 2wd. I took it for a smog test and it failed the NOX part the acceptable limit is 930ppm and mine was about 1536ppm. So I took it home did an oil change and ran a...