The knock sensor is a passive device that has no effect on engine idle.
The knock sensor has no effect on idle. It has no effect at all unless it is triggered by detonation. It is a passive device.
Yes, sadly it can, especially in the Jeep 4.0
YES it does. It should be close to intake.
Not likely but possible. I would suspect a leaking vacuum hose.
Try cleaning the EGR valve.
The oxygen sensor, if defective, will give inaccurate readings to the engine management computer and may lead to a rough idle.
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.
If an alternator is going bad it can cause a rough idle in a 1993 Subaru Legacy. Cold temperatures in the winter can also cause a rough idle in the Subaru Legacy.
The EGR valve or the Knock Sensor could be the problem here. Repairs run about $500.00 at a shop or do it yourself for about $250.00
What can cause a 1195 Oldsmobile to idle rough?
Maybe your air filter or plugs and wires. Or maybe your MAF sensor or your IAC valve needs cleaning.