The PCM provides much better control of the charging than an external regulator. You may be fine with an external regulator but the computer does the job better.I spoke too soon. I drove the car yesterday and about 20 min into my drive around town the check engine light came back on .. and it stopped charging again . ARRRGGGGHHH.. I guess the PCM is bad... I wonder why they went to the voltage regulator in the computer.
Well I guess I am going to have to replace the computer or hook up an external voltage regulator
It is so rare they fail I would have no problems with a used junkyard computer in an older car like this. And like Bob says the problem is often not the computer.I am just leary that I am going to have the same problem again down the road with a refurbed computer. You cant get a new one now a days