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Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

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  #1  
Old 08-20-2010, 09:17 PM
Diesel Fan
Status: Just got my truck driving !!!!!!!!

   

Shut Mouth P0089 Fuel Pressure Regulator Performance

I have had my truck less than a week and it throws a code to day P0089 Fuel Pressure Regulator Performance can any one tell me any thing about it ? i cleared it and 30 mi or so it threw it for a second time
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  #2  
Old 08-31-2010, 11:32 PM
oglejust's Avatar
Diesel Wrench

   

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Circuit Description
The engine control module (ECM) uses commanded fuel pump flow to determine a desired fuel rail pressure (FRP). The actual fuel pressure is monitored using the FRP sensor. If the FRP sensor indicates a pressure more than 20 MPa greater than desired, DTC P0089 will set.

Conditions for Running the DTC
• DTCs P0192, P0193, or P0641 are not set.

• The ignition is ON.

Conditions for Setting the DTC
• The difference between actual and desired FRP is more than 20 MPa.

• Commanded fuel pump flow is 100 mm│/second or less.

basically u have 4 choices
1. wiring
2. ecm
3.fuel rail pressure sensor
4.fuel pressure regulator

oglejust's Sig:94 2500 4x4 12 valve - sdx 5x.014 injectors, no plate, afc mods, sdx comp dvs, 4k gsk, 60# valve springs, rack plug, 22.5* timing, airdog 150, arp head studs, .020 headgasket, 3 piece manifold, 4in exhaust with 6in stack, afe filter, gutted grid heater... not enuff air
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  #3  
Old 09-01-2010, 08:57 AM
Diesel Fan
Status: Just got my truck driving !!!!!!!!

   

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I have been running Lucas Fuel treatment in it for the last couple tanks and i cleared the code after the first tank because the the motor surge that had started to show up when slowing down ,befor the fuel treatment, had went away. Knock on wood it has stayed off.
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