FINALLY REPLACED MY FPR.....
That 340 bolt on the back of the chamber is a pain in the *****. I wonder how anyone else got that loose. ??? Jolly?
Anyways. I average 13.6 mpg prior to this change and hard start ups (cranking the key while depressing the gas pedal for about 7 seconds each time), misfire codes daily and lots of gas smelling exhaust. But remember I am lifted and running 20'' chrome rims or 265-75 tires otherwise.
After replacing it. I was crusing at 60ish mph and saw on my scan gauge for the first time instant mpg over - 20 -. Also, it has fired up each time like it should with no gas pedal depression or exhaust. And I drove all day without a misfire code.
-- I would advise everyone to at least look at and clean your FPR even if you dont have the symptoms I do. Mine was very dirty and full of debris.