My 07 century is lagging after I filled up fuel at Love's in Tom's brook VA yesterday

Get some extra fuel filters and CK. for water in bottom of filter,if not best to go to the shop that made the eng. they can get it fixed before T/stop or F/liner dealer.

 

I have had this problem before, I had to change the fuel filter twice, I think, before the trash was cleaned out.

 

loves has a higher bio blend than other stops. this causes less power. heard of this before, I have to drop a gear on some grades if I have fuel from loves, where as I do not have that prob with other fuels.

 

...and another reason not to go to Love's

 

the code 39
DESCRIPTION OF FLASH CODE 39
Flash Code 39 is used for several EGR (Exhaust Gas Recirculation) system or VNT (Variable Nozzle Turbine) operational faults. These codes are typically logged in the ECU when one of the components are faulty.
SAE J1587 EQUIVALENT CODE FOR FLASH CODE 39
The SAE J1587 equivalent codes for Flash Code 39, EGR valve fault:
s 146/2, EGR leak - Boost Power
s 146/12, EGR leak - Boost Jake
s 146/7, EGR Valve not responding
The SAE J1587 equivalent codes for Flash Code 39, VNT vane fault:
s 147/2, VNT Vanes not responding - Boost Power
s 147/12, VNT Vanes not responding - Boost Jake
s 147/14, EGR flow too low s 147/11, VNT Vanes at Max - Jake
s 147/7, VNT Vanes not responding - EGR
There are no wires to check for Flash Code 39. The sensor values and the ECU calibration are used to decide a mechanical fault is present.
TROUBLESHOOT FLASH CODE 39
The following procedure will troubleshoot Flash Code 39.
For all EGR related codes, always perform the basic checks in EGR-1. Performing the basic checks will troubleshoot the components that will be responsible for logging these codes for Series 60 engines refer to MAINTENANCE ALERT SYSTEM.
If the basic checks all pass, and no fault can be found with the VNT/turbocharger or EGR valve, then it is recommended that the information you have collected be available to discuss with Detroit Diesel Technical Service.
1. Code s 146/7 - occurs if actual EGR rate during EGR mode operation is less than it should be. This fault will lock boost mode operation and illuminate the AWL for the remainder of the ignition cycle.
2. Code s 146/2 - occurs if actual EGR rate during Power Boost mode operation is greater than a calibrated value. This fault will illuminate the AWL for the duration of the fault being active.
3. Code s 146/12 - occurs if actual EGR rate during Boost Jake mode operation is greater than a calibrated value. This fault will illuminate the AWL for the duration of the fault being active.
4. Code s 147/7 - occurs if error in actual EGR rate vs desired EGR rate (Actual - Desired) during EGR mode operation. This FMI signifies excessive EGR flow. This fault will lock boost mode operation and illuminate the AWL for the remainder of the ignition cycle if the actual is greater than the desired.
5. Code s 147/2 - occurs if error in actual boost vs desired boost during Power Boost mode operation is greater than it should be. This fault will illuminate the AWL for the duration of the fault being active.
6. Code s 147/12 - occurs if error in actual boost vs desired boost during Jake Boost mode operation is greater than it should be. This fault will illuminate the AWL for the duration of the fault being active.
7. Code s 147/14 - occurs if error in actual EGR rate vs desired EGR rate (Desired - Actual) during EGR mode operation. This FMI signifies low EGR flow. This fault will illuminate the AWL for the duration of the fault being active.
Verify Repairs
Perform the following steps to verify repairs:
1. Reassemble the engine.
2. Start and run the engine.
3. Perform a road test.
4. Check for logged codes.
[a] For Series 60 engines, refer to MAINTENANCE ALERT SYSTEM. Or, call Detroit Diesel Technical Service.
If no codes are logged, repairs are complete.
Copyright © Detroit Diesel Corporation 2004 - All information subject to change without notification

 

I think your engine is 06 model year. Check you engines model year . FYI some 07 engines were updated by Detroit Diesel and Delta P sensors were removed..google and you will find info about it..