[PWR_RYD93]

Try removing the FMU first since that doesn't cost you any money. See if your overly rich condition clears up. If not, get the adjustable regulator and gauge and try dropping the fuel pressure a few psi.

Oh, another free thing to check: make sure your fuel return line is not pinched anywhere. It's a hard line back to the tank and runs along side the fuel supply line on the passenger side of the car (very close to the rocker panel). Occasionally someone will accidently jack the car up and pinch that line. Fuel is then restricted back to the tank, so fuel pressure in the rails is increased. it's worth a look see.