I believe my 1997 3.8 needs a PCM. I get a cam position sensor code even after replacing the sensor. Another 97 I had did the same thing. PCM was the issue. Mine is #F6SZ12A650AF. I found on F6SF code on EBay. Will it work? What's the difference? I remember seeing on here someone could flash the units for stock or improved performance. Can this be done? Who was it? I am in 37412. Thanks.