I had the '33 out for about 75 miles of highway running yesterday and it seemed to be loading up and also seemed to be using more fuel than normal. This is the SBF 347 Stroker running Edelbrock's ProFlo XT EFI system. I also noticed some "flutter" to the right side exhaust, and it was loading up at idle and low rpm, like pulling away from a light. Right side plugs are sooty, more so than the left, but I also smelled some raw fuel in the left. Both baffle pipes are black & sooty, so I'm running rich. I'm pretty sure that my fuel map is dialed in pretty good, so I'm not looking to lean out the air/fuel at this point.

I hit the ignition to check fuel pressure, and it jumped immediately to 40psig as it should. After the pump prime cycle, in the past the pressure would hold constant (engine off) at 40psig for quite a while, at least 1/2 hour if not more. Now as soon as the pump stops the PI needle is falling, going to zero within three to five seconds. Now it could be the pressure regulator, which returns unused fuel to the tank, but I'm thinking that I may have a few injectors partially stuck open, or sticking. Anyone have experience in this arena? Ideas on best approach?