Exam 7: Valve Train and Variable Valve Timing Diagnosis

Variable valve timing is used to ________.

On engines that have variable cam timing on the intake cam only, the cam is advanced at lower speeds. This causes the intake valve to close ________ to improve low RPM torque.

If the incorrect grade of engine oil is used in and engine equipped with a variable displacement engine, what diagnostic trouble code (DTC) could be set?

The use of variable valve timing allows the elimination of the ________ on some engines.

Most variable camshaft systems use ________ to control camshaft position.