A proper Fuel Injector cleaning procedure should start by clearing Fuel Tank vapor pressure through fuel fill cap loosening. The maintenance sequence starts with taking out the positive crankcase ventilation (PCV) clean air tube from the air inlet duct before setting it aside and then proceeding to remove the resonator and air inlet duct from the
Throttle Body. The Brake Booster Vacuum Hose and connector needs detachment from the Intake Manifold before you remove the electrical connector from the central sequential fuel injection (CSFI) fuel metering body. Pennant jet removes
Spark Plug Wires from Distributor Cap cylinders 1, 3, 5 while extracting the fuel line bolt situated at the Intake Manifold rear. The technician should remove the fuel system pressure and undo both nut and clamp from the fuel pipe and extract the fuel pipes from the metering body. Install j 44466-12 and j 44466-13 to the metering body before tightening them while maintaining correct fuel pipe o-ring positions. The next step involves attaching the j 44466-11 and clamp together with the j 44466-13 to your fuel pipe before tightening them adequately. Secure the j 41413 while closing the tank valve then take out the regulator assembly. First install j 44466-10 to j 41413 tank before linking j 44466-10 hose to j 44466-12 component. Use the metering body electrical connector to connect the j 39021 and j 39021-210 and j 39021-301 while selecting 0.5 amps on the j 39021 amperage switch. Open the tank valve together with the j 44466-10 control to pressurize the system until it reaches a minimum pressure of 150 psi. Activate the j 39021 to fire an injector which will be checked through the pressure gauge drop to confirm proper operation before firing additional injectors. After testing conclude by turning off the j 41413 tank pressure valve while bleeding the pressure at j 44466-10 and replacing the fresh air tube on the pcv. Separate the j 44466-10 from both the j 44466-12 and j 41413 system and then separate the j 39021-301 and j 39021-210 and j 39021 from the metering body. Begin by reconnecting vehicle electrical power to the metering body then install the Brake Booster Vacuum Hose to the Intake Manifold followed by the ignition wire connection to the Distributor Cap. Fasten the resonator and air intake duct onto the Throttle Body keeping the wing nut at hand-tightening torque. Begin by getting the j 38500-a tool for the clean-up procedure. When you have it, close the valve at the bottom of the canister before adding top engine cleaner gm p/n 1050002 (Canadian P/N 992872) into the canister until it reaches the maximum capacity with regular unleaded gasoline remaining. Then install the canister top. Install the j 38500-a on a suitable underhood space while linking its hose to the service port of the j 44466-12 . Open the j 38500-a bottom valve afterward to secure an
Air Hose from the top hole for which you should set the regulator to 75 psi before starting. After the canister empties remove shop air supply and depressurize j 38500-a followed by disconnecting it from j 44466-12. Rearrange the sequence to remove the pcv clean air tube, resonator, air inlet duct and ignition wires. The technician should bleed j 44466-12 before removing j 44466-13 and j 44466-12 from the metering body followed by installing j 44466-13 while using the clamp before assembling j 44466-11 onto the fuel pipe. Reinstall the fuel pipe onto the metering body while placing all o-rings and washers along with spacers correctly, after which install the clamp and nuts before tightening them to 3 n.m (27 lb ft). Before installing the fuel pipe bolt apply threadlock gm p/n 12345382 (Canadian P/N 10953489) to its threads then tighten bolt to 6 n.m (53 lb ft). Start by connecting the Brake Booster Vacuum Hose together with the connector then attach the resonator and air inlet duct followed by installing the pcv clean air tube and finally putting the ignition wires onto the Distributor Cap. Add 1-ounce gm p/n 12345104 (Canadian P/N 12345515) port Fuel Injector cleaner to the tank for every gallon of gas present in the Fuel Tank and tell the customer to finish the remaining cleaner when refilling their gas tank. Start the engine while manually securing the Fuel Tank cap. Verify for any fluid leakage from the system. A tech ii scan tool should be used to check powertrain dtc codes while instructing the customer to switch fuel brands after clearing the stored codes with the tool disconnected.