Could someone take a look and tell me if things look ok?

I don’t really know what to look for and I’m not sure I did the test right.
I have not found a ‘How To’ that explains it in good detail.

TIA

TTT

Can no one read this log and give me some info?
Could you please point me in the direction of where I should post this log?

Trying to get to the bottom of my white smoke issues.

Balance rates are good
Wondering if its the CP3 or FPR
I need some help
I keep getting a P1093 code

Oh yes, looks eerily similar to logs I did before my CP3 upgrade. If you are not getting P1094 codes, I would say for sure its a CP3.

Thanks for the reply.

BTW I only started getting the P1093 code after installing a nicktane filter adaptor kit which replaces the original filter.

Someone suggested doing the FPR shim kit.

The shim install isnt going to help much if the pump cant make full rail pressure. In the logs actual rail pressure only made it to about 12,000 psi, I bet the truck runs like a dog over 2k rpm too. Its exactly what my truck done, a new CP3 made for a new truck.

What should the rail pressure be?

Actual and desired rail pressure should be about the same. Do you have a lift pump? If not I would put one on since this started happening after the nicktane install. That might help a little. The only way to tell if its a cp3 or injectors returning too much fuel is to do a return test on the injectors. It takes a few hours to do.

What is this return test you speak of?

To do a return test you have to remove the return lines from both banks and block off the cp3 return. You disable the fuel system by removing the IGN 1 relay so it won't start and measure the amount of fuel out of each bank.
Here is the bulletin.

File In Section: 06 - Engine/Propulsion System
Bulletin No.: 02-06-04-029
Date: June, 2002
SERVICE MANUAL UPDATE
Subject:
Revised Fuel System Diagnosis-High Pressure Side

Models:
2001 Chevrolet and GMC C/K Pickup Models (Silverado, Sierra) with 6.6L Engine (VIN 1 - RPO LB7)

This bulletin is being issued to revise Fuel System Diagnosis-High Pressure Side (formerly known as Fuel Return System Volume Test) in the Engine Controls- 6.6L sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.
The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.
Fuel System Diagnosis-High Pressure Side
Important: If you were not referred to this test from another diagnostic, do not perform this procedure. Only perform this test when the fuel is more than 18°C (65°F).

1.Were you referred here from one of the following diagnostics?
^DTC P0094
^Surges/Chuggles in Symptoms
^Rough, Unstable, or Incorrect Idle in Symptoms
^Fuel Injector (http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OD~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34858641/34859103) Balance Test with Tech 2
-If you answered Yes, go to the Fuel Pressure (http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OD~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34858641/58828685)
Regulator Graphing after step 38.
-If you answered No, go to Step 2.
2.Remove the air duct from the air cleaner assembly and the turbo inlet.
3.Remove the air intake pipe. Refer to Air Intake Pipe Replacement.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850300
4.Remove the fuel injection pump fuel return rubber hose from the junction block (2). Cap the fitting on the block with a 3/8 inch rubber cap (1) to prevent fuel leakage.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850301
5.Attach a rubber hose (1) with a barbed fitting to the fuel injection pump return hose and insert the other end into a 3.79L (1 gallon) clean fuel container (2).
6.Remove the retaining clip from the fuel return line (http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OD~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34858641/56209080).
7.Using the J 44581 Fuel Line Disconnect Tool, disconnect the fuel return line (http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OD~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34858641/56209080) from the fuel junction block. Refer to Quick Connect Fittings Service (Metal Collar).

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850302
8.Connect a 10 mm (3/8 in) hose (1) on the fuel return fitting and place the other end of the hose into a 100 ml (3.38 oz) container (2) for measuring liquids.
9.Remove the ignition 1 relay using the J 43244 Relay Puller Pliers.
10.Crank the engine in 15 second intervals, with one minute cooling time between, until fuel starts to flow into the measurement container.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850303
11.Elevate the hose to retain fuel in the hose, and empty the measurement container (2) into a suitable fuel container. Install the hose in the measurement container.
Important: The engine cranking speed must be more than 150 RPM.

12.Crank the engine for 15 seconds.
Important: Do not include the fuel from the fuel injection pump return hose in the measurement procedure.

13.Measure the quantity of fuel in the container.
^If there is more than 35 ml (1.2 oz) in the measurement container, go to step 19.
^If there is less than 35 ml (1.2 oz) in the measurement container, replace the fuel injection pump. Refer to Fuel Injection Pump Replacement. After the replacement, go to step 14.
Important: Ensure there are no fuel leaks from moved or changed components while performing this test.

14.Ensure that the engine is still set up as it was in steps 2 through 8.


15.Crank the engine in 15 second intervals, with one minute cooling time between, until fuel starts to flow into the measurement container.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850305
16.Elevate the hose to retain fuel in the hose, and empty the measurement container (2) into a suitable fuel container. Install the hose in the measurement container.
Important: The engine cranking speed must be more than 150 RPM.

17.Crank the engine for 15 seconds.
Important: Do not include the fuel from the fuel injection pump return hose in the measurement procedure.

18.Measure the quantity of fuel in the container.
^If there is more than 35 ml (1.2 oz) in the measurement container, go to step 19.
^If there is less than 35 ml (1.2 oz) in the measurement container, go to step 52.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850306
19.Remove the glow plug controller/relay. Refer to Glow Plug Relay (http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OD~N/0/80851247/83211660/83214935/83214939/34853741/34857029/56218451/56218749) Replacement.
20.Remove the fuel line retainers.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850307
21.Remove the banjo bolt (2) from left rear cylinder head.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850308
22.Install the black hose (1) of the J 45873 to the left rear cylinder head and install the other end of the hose into one of the J 45873 graduated cylinders.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850309
23.Remove the banjo bolt (3) from the leak-off block.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850310
24.Install the other black hose (1) of the J 45873 to the leak-off block (2) and install the other end of the hose into another J 45873 graduated cylinder.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850311
25.Remove the banjo bolt (4) from the junction block (2).
26.Crank the engine for 15 seconds while observing the fuel pressure relief valve on the junction block for fuel leakage.
^If fuel is leaking from the fuel pressure relief valve, replace the fuel pressure relief valve. Refer to Fuel Pressure Relief Valve Replacement.
^If no fuel is leaking from the fuel pressure relief valve, go to step 27.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850312
27.Crank the engine in 15 second intervals, with one minute cooling time between, until fuel starts to flow into one or both of the J 45873 graduated cylinders (1).
28.Elevate the hoses (2) to retain the fuel in the hoses, and empty the graduated cylinders into a suitable container.
29.Install the hoses (2) into 2 of the graduated cylinders (1).
Important: The engine cranking speed must be more than 150 RPM.

30.Crank the engine for 15 seconds.
31.Measure the quantity of fuel in each of the graduated cylinders.
If there is a difference of 10 ml or more between the 2 cylinders, remove the valve cover from the bank with the higher volume. Refer to Valve Rocker Arm Cover Replacement-Lower Left or Valve Rocker Arm Cover Replacement-Lower Right. Go to Step 32.
If the 2 cylinders are within 10 ml, perform steps 32 through 42 on BOTH banks.
Important: When the fuel injector (http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OD~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34858641/34859103) pressure lines are removed, debris will fall into the fuel injector inlet fitting. Vacuum the debris from the inlet fitting of the fuel injector.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850313
32.Remove the return line from injectors.

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850314
33.Install the four yellow hoses (2) from the J 45873 to the injectors (1) and the other end of the hoses into each of the J 45873 graduated cylinders.
34.Install the four injector supply lines.
Tighten
Tighten the supply lines to 44 N.m (32 lb ft).

http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OB0~P3R0H~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34860053/42063497/121144369/94850299/94850315
35.Install the fuel supply hose. Push the hose in until it locks.
36.Install the black hoses from the J 45873 into the same container that the fuel injection pump return hose is in.
Prime the fuel system 30 time to remove air from the fuel system. Air will be forced out of the system within 2 minutes.
37.Crank the engine in 15 second intervals, with one minute cooling time between, until fuel starts to flow into one or more of the graduated cylinders.
38.Elevate the four hoses to retain the fuel in the hoses, and empty the 4 graduated cylinders into a suitable container.
39.Install the hoses in the graduated cylinders in numerical order.
Important: The engine cranking speed must be more than 150 RPM.

40.Crank the engine for 15 seconds.
41.Measure the quantity of fuel in each of the graduated cylinders.
^If there is more than 4 ml of fuel flow from any fuel injector (http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OD~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34858641/34859103)(s), replace the high flowing fuel injector(s). Refer to Fuel Injector Replacement. After the replacement, go to step 42.
^If no fuel injector (http://www.motoralldata.com/alldata/MOTOR~V183330280~C35581~R0~OD~N/0/80851247/83211660/83214935/83214939/34853741/34857029/34858641/34859103) has a flow of more than 4 ml, install the valve cover. Refer to Valve Rocker Arm Cover Replacement-Lower Left or Valve Rocker Arm Cover Replacement-Lower Right. After installing the valve covers, go to step 43.
42.Repeat steps 36 through 41 until no fuel injectors have more than 4 ml of fuel flow.

Full rail pressure on a stock LB7 is just over 23,000 psi, you made half that when commanding full rail pressure.

Without a P1094, I am almost certain its only the pump. But, it would probably be advisable to at least see about the injectors, its not going to hurt anything. I give this one a 9 out of 10 chance you will be replacing the pump.

Wow!
Weblee99, that is some great info, thanks for the input.

Superpro56, thanks for the input I need it all.


So next question for you all.

Injectors are within spec at idle truck warm in park.
#4 and 5 are border line but under 4.

Injectors while in Drive with brake pedal pressed are in spec except # 4 and 5 are at 6+ at times but not constant. They bounce in and out.

What does this mean?

I have no idea of how the truck is suppose to run as I just got it.
The truck seems to pull (don’t mean a trailer) fairly well and I have seen it make over 23k of fuel pressure when getting on it. I think the truck could pull harder but what do I know.