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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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#2
Fri, September 24th, 2010, 02:54 PM
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I cleared all codes, reran the tests, KOER and KOEO. This was all done after checking the resistance on all injectors. They all come out the same and with in specs.
These are the new codes that I get with the AE Scanner on my laptop. P0475 P1280 ICP too low. Now on the idle I am running a Injection pressure of 481.96 psi and at 2200 rpm it is at 1153.2 psi. Do these numbers sound right? The truck is the same as before, so no change.
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Thank you and have a great day, Troy Detweiler I have a '99 F 250 7.3L Diesel w/ a 6 speed Tranny and 4x4. Mods: Amsoil dual bypass oil filters, Amsoil air intake mod DIY, fuel preasure spring mod(70psi), FU Chip and Burner , 3.73 rear gears, leveling kit (DIY), Stabilizer bars on the rear axle (DIY). '02 F 350 7.3L, 6spd,4x4,CC, Dually- Just bought 4-15-11 
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#4
Fri, September 24th, 2010, 03:22 PM
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And just so we are all on the same page here - the truck is missing at idle and under load, correct?
Would you guess it is a steady miss, or more of a random misfire? There are no more CCT faults? No actual CEL when running?
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#5
Fri, September 24th, 2010, 03:25 PM
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And just so we are all on the same page here - the truck is missing at idle and under load, correct? correct
Would you guess it is a steady miss, or more of a random misfire? Steady There are no more CCT faults? none No actual CEL when running? no light I will try the CCT with the ICP unplugged when I get back home. But why is the P0475 code in there?
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Thank you and have a great day, Troy Detweiler I have a '99 F 250 7.3L Diesel w/ a 6 speed Tranny and 4x4. Mods: Amsoil dual bypass oil filters, Amsoil air intake mod DIY, fuel preasure spring mod(70psi), FU Chip and Burner , 3.73 rear gears, leveling kit (DIY), Stabilizer bars on the rear axle (DIY). '02 F 350 7.3L, 6spd,4x4,CC, Dually- Just bought 4-15-11
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#6
Fri, September 24th, 2010, 03:49 PM
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The P0475 indicates an Exhaust Backpressure (EBP) Control performance concern. Monitor the exhaust backpressure reading Key On Engine Off (KOEO) and at idle. This value should be equivalent to atmospheric pressure. A typical reading at sea level would be 14.6-14.8 PSI.
Monitor for an increase under load to see if increases, not to exceed approximately 35 PSI. If no increase is noted, check/replace the sensor and exhaust supply tube for carbon restrictions and recheck for proper operation. This will not cause your misfire. If you are feeling really ambitious you can pull both valve covers off and disconnect the injectors, one by one, with the engine running. You are looking for the one that doesn't change the way the engine runs, or has the least effect on it. Kinda a crude way to do it, but gets the job done.
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#7
Fri, September 24th, 2010, 05:52 PM
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number 8 has almost no change to the engine. But the rest cause the motor to slow down and miss worse. So does that mean that the #8 injector is bad?
Also this truck has 342K on it. Would u just replace q injector or should I change all 8? Can these injectors be changed out with a set from a 97 motor? I have a spare set of those laying around. So it would be a cheap fix for me. This truck is an early 99, build date of 5/98.
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Thank you and have a great day, Troy Detweiler I have a '99 F 250 7.3L Diesel w/ a 6 speed Tranny and 4x4. Mods: Amsoil dual bypass oil filters, Amsoil air intake mod DIY, fuel preasure spring mod(70psi), FU Chip and Burner , 3.73 rear gears, leveling kit (DIY), Stabilizer bars on the rear axle (DIY). '02 F 350 7.3L, 6spd,4x4,CC, Dually- Just bought 4-15-11
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