E46Fanatics - View Single Post - Alien OEM Fuel Pressure Regulator pulled from 03' M3
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Old 10-05-2012, 10:12 AM   #3
Registered User
Join Date: Jul 2007
Location: Phx, AZ
Posts: 10
My Ride: 03 M3
Driving around with the supposedly correct FPR (5 bar), the car seems to have lost quite a bit of umph; the idle catches itself way down at 200-400rpm every time I left off; throttle response is delayed. Overall, everything smells rich. LTFT shows -9%/-11%; STFT jumping from +2% to -6%. Throw the incorrect 3.5 bar back in?

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