Relevant mods include a built 406, 30 lb injectors, and accel dfi for tuning. When I bought the car I never bothered to check and see what fuel pressure was because it was running flawlessly and I just never thought to check it. Recently I've been running pig rich on all cylinders. No settings were changed in the dfi nor was anything else changed. I've narrowed it down to a fuel pressure regulator that just went bad and is stuck closed. I just need a ballpark fuel pressure to set the car to when I get the new regulator in for the time being until I can get some dyno time and have it tuned. I'm not too familiar with fuel injected setups, so I have no clue what to aim for. On my built dsm I used to set it at around 45 psi with the vacuum hose disconnected, but on this car I haven't a clue. I'm just looking for a ballpark figure. Thanks!

 

I run 49, the higher the pressure the better the fuel atomization. For you starting at 45 and going from there will work.

 

awesome, thanks!