Okay so I have been running a walbro 255 fuel pump but my stock regulator could not handle it so my fuel pressure was at 120 psi, I finally went out and bought an AFPR from Extreme PSI (Fuel Lab 515 kit) After installation we tried to lower the pressure to no avail. I've tried everything from pulling my vacuum line like your supposed to do, to taking it apart and inspecting the diaphragm for damage/debris, also I've tried it with the car on & off. I have not checked my return line for blockage since I just replaced that line about a month ago (but I know it could still be clogged) its weird cause it sits around 97 psi and it will raise above that point and I can lower down but only to about 97-98 psi. Any suggestions or ideas? Had anyone had a similar issue?