Quote:
Originally Posted by ZLRob
Not much you can check outside of the fuses. I made an access hatch set up for mine so I can do fuel pump replacements or services right there in my garage without needed to lift the car and drop the tank. It proved to be a very worthwhile mod as I had to go in there several times since for multiple reasons. if you have the means and resources, I'll recommend the same mod to you, but if not, take it in, as it sounds like the pump sounds highly suspect. They can and do fail out of nowhere.
Best of luck to you!
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You can see low and high pressure fuel data from the pcm. You can also see fuel trim which will tell you how much demand is being requested.
The fuel pump driver module is above the rear diff. So since you have problems with the rear diff also you might get under there and find a rodent nest or missing wires that got chewed off.