My car is an '09 GT manual transmission with 88k miles on it. Totally stock except for FRPP CAI and Brenspeed tune. Ever since I bought it (75k miles) its had a hesitation that often happens when I first let out the clutch from a stop. Its also a little jerky as I accelerate in first and into second gear (normal city driving). Throttle body is clean, TPS is new, and plugs have been replaced. Fuel filter is also new. O2 sensors are also new. Reading some of the threads here on fuel pressure and pumps, I decided to data log mine. Based on what I saw in this thread (http://www.s197forum.com/forum/showthread.php?t=106864&highlight=pressure&page=2), I'm thinking that my pump could be bad. My pressure (FRP) varies from 33 up to 51 lbs. I've attached a snip from the data log showing the FRP variation. RPM is also in the chart showing me from a start and into second and third gears. This was normal city driving (not WOT). Should the pressure vary as much as the chart is showing?