1st Reading

330 kPa (48 psi)

330 kPa (48 psi)

330 kPa (48 psi)

330 kPa (48 psi)

330 kPa (48 psi)

330 kPa (48 psi)

2nd Reading

165 kPa (24 psi)

124 kPa (18 psi)

152 kPa (22 psi)

186 kPa (27 psi)

165 kPa (24 psi)

165 kPa (24 psi)

Amount of Drop

165 kPa (24 psi)

206 kPa (30 psi)

179 kPa (26 psi)

145 kPa (21 psi)

165 kPa (24 psi)

165 kPa (24 psi)

Average Range: 162-183 kPa (23.5-26.5 psi)

Injector OK

Faulty injector - too much fuel drop

Injector OK

Faulty injector - too little fuel drop

Injector OK

Injector OK

Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?

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Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

Did you perform the Fuel Injector Coil Test?

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Go to Step 3

Go to Fuel Injector Solenoid Coil Test - Engine Coolant Temperature Between 10-35 Degrees C (50-95 Degrees F)

Important: Do not perform this test if the ECT temperature is more than 94°C (201°F).

Use a scan tool in order to monitor the ECT parameter.

Is the ECT parameter less than the specified value

94°C (201°F)

Go to Step 4

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4

1. Turn OFF the ignition.

Caution: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel pressure gage. Place the towel in an approved container when the connection of the fuel pressure gage is complete.

2. Install the J 34730-1A Fuel Pressure Gauge.
3. Turn ON the ignition, with the engine OFF.
4. Use a scan tool in order to command ON the fuel pump.
5. Place the bleed hose of the fuel pressure gauge into an approved gasoline container.
6. Bleed the air from the fuel pressure gauge.

Important: The fuel pump will run for approximately 2 seconds. Repeat Step 7 as necessary in order to achieve the highest possible fuel pressure.

7. Use the scan tool to command the fuel pump ON.
8. Use the fuel pressure gauge in order to observe the fuel pressure parameter.

Is the fuel pressure within the specified value?

333-376 kPa (48-55 psi)

Go to Step 5

Go to Fuel System Pressure Test (VIN K) or Fuel System Pressure Test (VIN 1)

5

After the fuel pump stops, the fuel pressure may vary slightly, then it should hold steady.

Does the fuel pressure remain constant within the specified value?

333-376 kPa (48-55 psi)

Go to Step 6

Go to Fuel System Pressure Test (VIN 1)

6

1. Install the J 39021 Fuel Injector Coil/Balance Tester.
2. With the fuel injector tester, select the 0.5-2.5 amp position.
3. Use the scan tool in order to command the fuel pump ON, then OFF.
4. After the fuel pressure stabilizes, record the fuel pressure parameter on the fuel pressure gauge . This is the first pressure reading.
5. Press the PUSH TO START TEST button on the fuel injector tester.
6. When the fuel pressure gauge needle stops moving, record the fuel pressure parameter. This is the second pressure reading.
7. Repeat for each remaining fuel injector.
8. Subtract the second pressure reading from the first pressure reading for each fuel injector. The result is the pressure drop value.
9. Record a pressure drop value for each fuel injector.
10. Add all of the individual pressure drop values. This is the total pressure drop.
11. Divide the total pressure drop by the number of fuel injectors. This is the average pressure drop.

Does any fuel injector have a pressure drop value that is either higher than the average pressure drop, or lower than the average pressure drop by the specified value?

10 kPa (1.5 psi)

Go to Step 7

Symptoms

Replace the faulty fuel injectors. Refer to Fuel Injector Replacement

Is the action complete?

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Go to Step 8

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Does any driveabilty condition still exist?

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Go to Applicable Diagnostic

System OK