High Pressure fuel testing *
10 Attachment(s)
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? o DTC P1094 o Surges/Chuggles in Symptoms o Rough, Unstable, or Incorrect Idle in Symptoms o Fuel Injector Balance Test with Tech 2 o If you answered Yes, go to the Fuel Pressure Regulator Graphing after step 55. o 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. https://www.dieselbombers.com/attach...1&d=1271132216 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. https://www.dieselbombers.com/attach...1&d=1271132216 5. Attach a rubber hose (1) with a barbed fitting to the fuel injection pump return hose and insert the other end into a 1 gallon clean fuel container (2). 6. Remove the retaining clip from the fuel return line. 7. Using the J 44581 Fuel Line Disconnect Tool, disconnect the fuel return line from the fuel junction block. https://www.dieselbombers.com/attach...1&d=1271132216 8. Connect a 3/8 inch 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. https://www.dieselbombers.com/attach...1&d=1271132216 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. o If there is more than 35 ml (1.2 oz) in the measurement container, go to step 19. o 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. https://www.dieselbombers.com/attach...1&d=1271132216 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. o If there is more than 35 ml (1.2 oz) in the measurement container, go to step 19. o If there is less than 35 ml (1.2 oz) in the measurement container, go to step 52. https://www.dieselbombers.com/attach...1&d=1271132216 19. Remove the glow plug controller/relay. https://www.dieselbombers.com/attach...1&d=1271132216 20. Remove the fuel line retainers. https://www.dieselbombers.com/attach...1&d=1271132216 21. Remove the banjo bolt (2) from left rear cylinder head. https://www.dieselbombers.com/attach...1&d=1271132216 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 https://www.dieselbombers.com/attach...1&d=1271132216 23. Remove the banjo bolt (3) from the leak-off block. |
Fuel System Diagnosis - High Pressure Side
10 Attachment(s)
https://www.dieselbombers.com/attach...1&d=1271132730
https://www.dieselbombers.com/attach...1&d=1271132730
https://www.dieselbombers.com/attach...1&d=1271132730
https://www.dieselbombers.com/attach...1&d=1271132730
https://www.dieselbombers.com/attach...1&d=1271132730
https://www.dieselbombers.com/attach...1&d=1271132730
https://www.dieselbombers.com/attach...1&d=1271132730 Good Fuel Pressure Regulator Graph, 0 Miles https://www.dieselbombers.com/attach...1&d=1271132730 Good Fuel Pressure Regulator Graph, 26K Miles https://www.dieselbombers.com/attach...1&d=1271132730 Fuel Pressure Regulator Graph, Surging
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