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help running out of ideas

  1. K

    Need some help

    I have a explorer sport 97 sohc with 160000 miles. I'm experiencing a rough idle and is throwing two cel codes p0153 and p1504 I have replaced both tge iac and o2 sensor. I have checked for vaccum leaks and have found none. Cleaned maf, throttle body, new iac, tps. I have ran out of ideas. Any...
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