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Old Aug 15, 2012 | 07:43 PM
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loosing power
I have a 99 f350with 7.3. I loose power after 10 miles or so and if i let it sit for a while it will be fine for a bit and then act up again. I have changed fuel pump, fuel filter, air filter, cam shaft sensor, high pressure oil sensor, and back pressure sensor and cleaned the tube. I put it on the modis and it says low back pressure sensor and cam shaft sensor still after I cleared the codes twice. It acts like its running out of gas. Can some one please help me?
 
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Old Aug 15, 2012 | 07:47 PM
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Check fuel pressure, maybe consider the "Hutch" mod to eliminate the mixing screens.

Do you know which code number it was for the EBPS?
 
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Old Aug 15, 2012 | 07:54 PM
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there is no code on it now the only code that came up was ICP pressure above/below desired code #P1211
 
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Old Aug 15, 2012 | 07:55 PM
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i don't loose fuel pressure when it acts up
 
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Old Aug 15, 2012 | 08:18 PM
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Check for boost leaks!!!
 
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Old Aug 15, 2012 | 08:20 PM
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Originally Posted by JT Smitty
i don't loose fuel pressure when it acts up
How do you know you dont loose fuel pressure?
 
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Old Aug 15, 2012 | 08:22 PM
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i have the modis still hooked up to my truck when it acts up and i can see the readings.
what ami looking for with boost leaks?
 
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Old Aug 15, 2012 | 08:27 PM
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The PCM can not view fuel pressure. There is no PID for it. You can view ICP(Injector Control Pressure) but that is the high pressure oil side of the injector.
 
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Old Aug 15, 2012 | 08:30 PM
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would't the icp drop if the fuel pressure drops?
 
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Old Aug 15, 2012 | 08:32 PM
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Sometimes you can get an uncontrollable 1211 due to low fuel pressure. But PCM is still going to try to command desired ICP and may achieve.
 
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Old Aug 15, 2012 | 08:34 PM
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so where would i look for low fuel pressure. I have changed the pump and the filter and i had the tank out and the screen is fine
 
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Old Aug 15, 2012 | 08:40 PM
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Fuel pressure test ports on the filter bowl.

http://www.guzzle7pt3.com/pics/fbowl/newFuelBowl.jpg
 
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Old Aug 15, 2012 | 08:41 PM
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where would the problem be if it is low
 
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Old Aug 15, 2012 | 08:42 PM
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What is the oil level and condition?

Have you been monitoring live data when it dies?
 
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Old Aug 15, 2012 | 08:43 PM
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oil is fine and yes i have been
 
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