GM 12589465
Injector

The tools required to clean fuel injectors include j 37287 (Fuel Line Shut-Off Adapters) and j 35800-a (Fuel Injector Cleaner) alongside j 42873-1 (3/8 Fuel Line Shut-Off Valve) and j 42873-2 (5/16 Return Pipe Shut-Off Valve) and j 42964-1 (3/8 Fuel Pipe Shut-Off Valve) and j 42964-2 (5/16 Fuel Pipe Shut-Off Valve). Gm top-engine cleaner (P/N 12346535 for US dealers or Canadian P/N 992872) should be used alone as the cleansing agent without fuel tank addition and the solution concentration must stay below 10 percent. Us dealers must empty two 24 ml containers of gm top-engine cleaner into the j 35800-a but canadian dealers need to measure and add 48 ml of the same product to this tank. Clients who wish to use an engine cleaning product different from gm top-engine cleaner must combine 96 ml of their selected cleaner with 864 ml of regular unleaded fuel. Begin by enabling the injector cleaning tank with fuel but you must disable the vehicle Fuel Pump and disconnect the fuel feed followed by plugging the lines through the proper shut-off adapters. Insert the j 35800-a into the Fuel Rail while maintaining 510 kpa (75 psi) pressure for a duration until engine stalling occurs. The Fuel Pump relay and lines should be reconnected before letting the vehicle idle for another two minutes of operation. The injector balance test should determine the drop in fuel pressure of each injector. Replace the injector with the lowest pressure drop if necessary. The solution requires customers to add port Fuel Injector cleaner (GM P/N 12345104 or Canadian P/N 10953467) in one ounce amount per gallon of gasoline while instructing them about fuel brand impacts and recommending regular cleaner usage to stop future problems. Drive the vehicle during the road test to make sure the original customer problem no longer exists.

Leaking fuel injectors may contaminate the engine oil.

Road test the vehicle.

Connect the fuel injector electrical harness connectors to the fuel injectors and reinstall the fuel rail assembly.