DeVille V8-4.6L VIN Y (1998)
cause the rings to stick again.
18.
Allow the chemical to remain in the engine cylinders a minimum of two hours.
Important:
While evacuating the cleaning solution from each cylinder, manipulate the hose around the circumference of the cylinder to ensure all fluid is
removed.
19.
After the two hour soak period, connect the evacuation pump assembly, J 45076-2, to shop air and evacuate the piston and ring cleaner solution
from each cylinder through the spark plug hole.
20.
Properly dispose of used cleaning solution by putting it into waste oil.
Important:
If a second application of piston and ring cleaner is necessary (see Correction above), repeat Steps 7 through 20.
21.
Change the engine oil. The filter will be changed after the road test.
22.
Add 6.6 L (7 qts) of oil and inspect for visible oil leaks.
23.
Place shop rags over all plug holes and intermittently bump over engine to ensure no hydraulic lock is present.
24.
Crank the engine continuously for 20 seconds.
25.
Remove the rags and reinstall the spark plugs.
26.
Reinstall the ignition coil module.
27.
Remove the mass air flow (MAF) sensor and the air cleaner for access to the throttle body.
28.
Use the aerosol Throttle Body Cleaner, P/N 12378550 (in Canada, P/N 88901335), included in kit P/N 12378545 (in Canada, P/N 88901333) and
manually clean the throttle body and the idle air control (IAC).
29.
Remove the exhaust gas recirculation (EGR) valve.
30.
Install EGR Cleaner adapter J 45076-45 and throttle body cleaner adapter. For 1996-1999 models use the J 45076-46 throttle body adapter. For
2000-2003 models use the J 45076-55 throttle body adapter. The J 45076-55 is held in place by the air intake duct.
31.
Remove the position crankcase ventilation (PCV) valve. Inspect for proper operation and clean or replace as necessary.
32.
Connect vehicle exhaust pipes to shop ventilation system.
33.
Pour induction cleaner, P/N 12378552 (in Canada, P/N 88901336), included in kit P/N 12378545 (in Canada, P/N 88901333) into the CPFI
canister, J 35800-A, and connect the canister to the EGR Cleaner Adapter and Throttle Body Cleaner Adapter, J 46076-46.
34.
Pressurize the canister to 138 kPa (20 psi).
35.
Start the engine. Connect the Tech 2(R) and raise the engine RPM to 1100 RPM with Tech 2(R) at F3-RPM Output.
36.
Open the valve on the canister to induce the induction cleaner through the MAF and the EGR Adapter. Regulate the air pressure to obtain a good
fan pattern of the solution into the throttle body, but not so much that the fluid overflows out of the throttle body.
37.
When the canister has been emptied (use the pressure regulator to release pressure then close the canister valve), exit the Tech 2(R) F-3 function to
reduce the engine RPM to normal idle speed.
38.
Turn the ignition to Off.
39.
Remove the EGR Cleaner Adapter and the Throttle Body Cleaner Adapter, J 45076-45 and J 45076-46.
40.
Reinstall the EGR valve, MAF Sensor and air cleaner.
41.
Use the Tech 2(R) to clear any DTCs set during the cleaning procedure. Disconnect Tech 2(R).
Note:
Start the vehicle and gradually increase the RPM to 2000 RPM in park. Engine damage could result from any fluid left on top of the piston if
RPM is increased too quickly.
