If ya Google 'pcm fuse keeps blowing', there's lots of posts about that same problem. Probably a short to ground, but where? If it runs good til the fuse blows again, the PCM may still be okay.
You might need to get it to an Isuzu shop where they can track down the short with their electronic gizmos. Not a cheap answer, but can you find it on your own?
Mark
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