I looked at 4.2l engine early production wiring. My wiring doesn't say pcm fuse, it just gives a number and amp rating. If it is the fuse I'm thinking about, like hunting a needle in a haystack. That fuse supplies many different circuits.
Just a thought, try pulling the fuel pump relay and see if still blows the fuse. That may not be conclusive?
Friday, November 23rd, 2012 AT 7:16 PM