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  1. Troubleshooter's Forum
    P0172 bank 1 running rich. Injectors, coils, fuel pump, IAC valve, TPS, coolant temp sensor, all 4 02 sensors, cats etc. all replaced. Has high fuel pressure; (spec is 49 +/-2) at 60 PSI and needle bounces around. Replaced fuel pump twice thinking the regulator was failed. Tried to buy the OEM...
  2. Troubleshooter's Forum
    Fully rebuilt engine with ~400 miles so far, have P0172 bank 2 running rich code and P0300 random misfire. Truck runs a little rough and noticeable power loss. If batteries disconnected and reconnected, codes clear and truck runs GOOD. After some driving codes come back and it runs rich again...
  3. 4.7L/4.7L HO/4.7L Gen II Engines
    Fully rebuilt engine with ~400 miles so far, have P0172 bank 2 running rich code and P0300 random misfire. Truck runs a little rough and noticeable power loss. If batteries disconnected and reconnected, codes clear and truck runs GOOD. After some driving codes come back and it runs rich again...
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