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  1. Drivetrain Tech Center
    I have a 1996 Jeep grand cherokee limited with the 4.0 I6, when i got it it had a miss and smoked a little black and got crappy MPG's, so I put the scanner on it and it said code p0171 bank 1 lean. I was told it was first a coolant sensor so changed that made no difference and worse it still...
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