because its either cold and not warmed up or you lifters are knocking but the would be a louder knocking sound
I read that bad motor mounts can cause this knocking sound
what type of motor is it? the quad 4 or the 2.2
A knock sensor detects engine knock in the motor(aka pinging, detonation, or uncontrolled explosions. it basically means the motor is about to blow up or potentially could.) the second part to a knock sensor is that it keeps the ignition timing as advanced as possible to make the most power without making engine knock. So if you have a bad knock sensor or have a check engine light form a knock sensor your car will be slower. this is when your car goes into LIMP mode which is basically a preset running condition which is safe for the motor.
probably a loose wire. When you rev the motor it slightly changes the angle so it has contact.
No, it will not cause the engine to knock.
You have a vacuum leak at the intake.
bearing on crankshaft worn or damaged, caused by lack of oil. start engine if it will and pull plug wires off one at a time and you'll find out wich one. do not rev up engine too high. do not sell car to a friend. motor has to come out and extensive repair on lower end required. if you do not know what a rod bearing knock is then it is not a do it yourself fix. major repair.
bearing on crankshaft worn or damaged, caused by lack of oil. start engine if it will and pull plug wires off one at a time and you'll find out wich one. do not rev up engine too high. do not sell car to a friend. motor has to come out and extensive repair on lower end required. if you do not know what a rod bearing knock is then it is not a do it yourself fix. major repair.
Check the earth on your inlet manifold. The pick-up is part & parcel of the engin "KNOCK SENSOR"!
The knock sensor is on the passenger side of the motor along the top of the oil pan about half way on the block.
the motor could pre-detonate or "knock" that can cause damage
there is a rev limit setting in the ecm so you dont over rev the motor