So, in follow-up to my other threads on the FiTech lean-spike that I *thought* I solved, I have replaced my mechanical fuel pressure gauge to a transducer that I am reading out to an Arduino. Strictly by reading the voltage coming from the transducer, I am seeing about a 5% pressure drop consistently (2.13V -> 2.03V, according to my transducer spec that is about a 3 psi drop). That is blipping the throttle at idle, so I imagine it's worse under load (will see when I get the Arduino mounted). I am dropping a line to FiTech and Dr. Google, but I'd like to get a sanity check, should I be seeing any pressure drop going through the FiTech TB regulator? I was under the impression that the ecu is especting 58 psi constantly to get the correct amount of fuel pulsed out. Sorry I am racking my brain at this point, thanks.