2008 Cadillac DTS Throttle Body

The engine control module (ECM) learns the idle position of the throttle plate to ensure the correct idle. The learned airflow values are stored within the ECM. These values are learned to adjust for production variation and will continuously learn during the life of the vehicle to compensate for reduced airflow due to coking. Anytime the throttle body airflow rate changes.

The recommended torque is 10 N.m (89 lb in).

Over an extended time and mileage, deposits may accumulate on the back of the throttle plate. Typically these deposits pose no problems. Occasionally the deposits may accumulate to a point where throttle valve movement is affected. This procedure should not be performed on vehicles with mileage under 80 450 km (50,000 mi).

You may need to remove the fuel injector sight shield and the air cleaner outlet duct, disconnect the positive crankcase ventilation (PCV) fresh air tube quick connect fittings at the camshaft cover and the air cleaner outlet duct, remove the PCV fresh air tube, disconnect the engine harness electrical connector from the throttle actuator, remove the transaxle vent hose clip from the shift cable bracket, remove the transaxle shift cable clip from the shift cable bracket, then remove the throttle body bolts, the shift cable bracket, and the throttle body, finally remove and discard the throttle body seal.

The procedure is to remove the fuel injector sight shield and the air cleaner outlet duct, inspect the throttle body bore and the throttle body plate for deposits, then clean the throttle body bore and the throttle plate using a clean shop towel with GM top engine cleaner, P/N 1052626 or AC Delco Carburetor Tune-up Conditioner P/N X66P or an equivalent product, then install the air cleaner outlet duct and the fuel injector sight shield.