Your fuel pressure regulator is actually part of the fuel filter assembly located in front of the fuel tank above the rear axle. Finding that hard to believe it is two in one, I sawed the old filter assembly in half and sure enough, there was the filter and the pressure regulator. And I found that part on Ebay for only $15 and replacing it actually made my 1999 Grand Cherokee Limited run better and get better mileage. This should be done every 50,000 miles or less. I hope this helps.
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