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| 1999 to 2003 7.3L Power Stroke Diesel 7.3L Power Stroke Diesel equipped Super Duty and Excursion. |
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#1
Mon, December 14th, 2009, 07:05 PM
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ok here are the codes I got,
P0232, P0603, P0478, and P0470. I know the 0603 is due to the tuner, and the last two are with the exhaust pressure sensor. I am wondering if that could be the reason for the low boost and bad mpg. Or could it be the fuel pump. Truck seems to run fine to me though hmm
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Tej Sakaria 00F250 CC 7.3 Turbo(Work) 03 S2000 2.0 Turbo (Toy) 06 330i 3.0 not Turbo (Wife's) 
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#2
Mon, December 14th, 2009, 07:22 PM
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P0470- Exhaust backpressure circuit malfunction
Open or shorted wiring/sensor. P0478- Exhaust backpressure too high under normal driving conditions. Stuck shut or partially shut exhaust backpressure valve or shorted EBP sensor. P0232- Fuel pump relay driver failed off. Voltage detected on fuel pump monitor circuit when pump was commanded off.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years. Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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Hybrid Mode
