#20796, "RE: Whats you Vacuum read @ Idle ??" In response to In response to 2
I would be willing to bet that that hissing sound that you are hearing is either your check valve on the regulator malfunctioning, or you have it installed backwards. Mine does not make any hissing noises. Also if you have your fuel pressure tuned at 50 psi at 10 er so vacuum, then does alter the rise rate of your fuel pressure. You will essentially be a bit lean untill WOT. Its probably not enough though to actually cause a problem.
Matt 1995 Eclipse GS 2.0L, S16g Turbo, 8 Injectors, 26psi
1998 Eclipse GSX 2.3L Stroker, AEM EMS Converted to Speed Density, FP3065 Turbo, 35psi , and so on...