Fuel pressure regulator location

The fuel pressure regulator on your Jeep is built in with the fuel filter assembly which is located above the rear axle, in front of the fuel tank. I found that hard to believe so when I replaced mine, I sawed the old one in half and there it was. A filter and a regulator which is simply a spring loaded gizmo all in one. I also noticed my gas mileage got better with that replacement.

I just repaired my fuel pump but it's still don't run right but I didn't change the pressure regulator I use the same housing but I changed the new fuel pump I put it into the old housing but it has the pressure regulator built onto the fuel pump

You might want to take a fuel pressure reading at the fuel injector rail where you will see a Schrader valve. The pressure should be about 60 psi. Scan for codes too as it may be an ignition problem rather than a fuel problem. That "pressure regulator" you see on your fuel pump is a relief valve but it does about the same thing.

I just changed injectors on the jeep grand Cherokee 2004 but still getting gas in the exhaust system any help