Added info to question: Vacuum also coincidently went from steady 20psi to 15psi/knock - small backfire/miss on acceleration from idle. Knock is steady at idle.
The knock sensor is a passive device that has no effect on engine idle.
There are a number of reasons why an engine would knock when you idle the vehicle. It could be your motor mounts. You may also need oil.
when stopped at red light or when in park
The proper idle speed for a Dodge with a 318 cubic inch engine about 475 to 500 RPMs. Any idle below that will cause stalling.
Not really an answer, more to the question. You can hear the knock at idle. However, if the engine has time to cool, it's not so audible. Also, if you hit the accelerator, the sound seems to die away when the engine returns to idle. The sound is coming from both the top and bottom of the engine.
Minimum of 10 psi at idle when the engine is warm.Minimum of 10 psi at idle when the engine is warm.
The knock sensor is located near the idle air control solenoid valve on a 2001 Subaru Forester. The knock sensor is responsible for sensing vibrations caused by engine knock.
It is integral to the idle stepper motor.It is integral to the idle stepper motor.
the idc or idle air controller is located on the left of the engine under the throttle body
Vacuum hose leaking.
No, the computer controlls that.
Depends on engine and year