Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Cleaning Procedure
2006 Buick Allure CXSSECTION Cleaning Procedure
WARNING: This page is about a different variant/trim than selected.
- Obtain J 35800-A (2). See Special Tools .
- For US dealers, empty 2 pre-measured GM Top-Engine Cleaner containers, 24 ml (0.812 oz) each, GM P/N 12346535, into the J 35800-A . See Special Tools .
- For Canadian dealers, measure and dispense 48 ml (1.62 oz) of Top-Engine Cleaner, Canadian P/N 992872, into the J 35800-A . See Special Tools .
- If you are using any other brand of tank you will need a total of 96 ml (3.24 oz) of Top-Engine Cleaner mixed with 864 ml (29.16 oz) of regular unleaded gasoline.
- Fill the injector cleaning tank with regular unleaded gasoline. Be sure to follow all additional instructions provided with the tool.
- Electrically disable the vehicle fuel pump by removing the fuel pump relay and disconnecting the oil pressure switch connector, if equipped.
- Disconnect the fuel feed and return line, if equipped, at the fuel rail. Plug the fuel feed and return line, if equipped, coming off the fuel rail with J 37287 or J 42964-1 , and J 42964-2 or J 42873-1 and J 42873-2 as appropriate for the fuel system. See Special Tools .
- Connect the J 35800-A to the vehicle fuel rail. See Special Tools .
- Pressurize the J 35800-A to 510 kPa (75 psi). See Special Tools .
- Start and idle the engine until it stalls due to lack of fuel. This should take approximately 15-20 minutes.
- Disconnect J 35800-A from the fuel rail. See Special Tools .
- Reconnect the vehicle fuel pump relay and oil pressure switch connector, if equipped.
- Remove J 37287 or J 42964-1 and J 42964-2 or J 42873-1 , J 42873-2 and reconnect the vehicle fuel feed and return lines. See Special Tools .
- Start and idle the vehicle for an additional 2 minutes to ensure residual injector cleaner is flushed from the fuel rail and fuel lines.
- Repeat steps 1-5 of the Injector Balance Test and record the fuel pressure drop from each injector.
- Subtract the lowest fuel pressure drop from the highest fuel pressure drop. If the value is 15 kPa (2 psi) or less, no additional action is required. If the value is greater than 15 kPa (2 psi), replace the injector with the lowest fuel pressure drop.
- Add one ounce of Port Fuel Injector Cleaner, GM P/N 12345104 (Canadian P/N 10953467), to the vehicle fuel tank for each gallon of gasoline estimated to be in the fuel tank. Instruct the customer to add the reminder of the bottle of Port Fuel Injector Cleaner to the vehicle fuel tank at the next fill-up.
- Advise the customer to change brands of fuel and to add GM Port Fuel Injector Cleaner every 5 000 km (3,000 mi). GM Port Fuel Injector Cleaner contains the same additives that the fuel companies are removing from the fuel to reduce costs. Regular use of GM Port Fuel Injector Cleaner should keep the customer from having to repeat the injector cleaning procedure.
- Road test the vehicle to verify that the customer concern has been corrected.
IMPORTANT:
Make sure the valve at the bottom of the canister (3) is closed.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.