Title: speedo not accurate on my 3.8 swap Post by: my3.8fiero on November 22, 2014, 10:46:59 am my 87 2.5 swapped to a 3.8 super speedo is not accurate any suggestions
Title: Re: speedo not accurate on my 3.8 swap Post by: Dan on November 22, 2014, 05:02:48 pm have the PPM in the PCM changed to match the tire sizes you are using
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