A knock sensor assures that you're getting as much power and fuel economy as is possible from your engine.
A knock sensor allows the engine to run with the ignition timing as far advanced as possible. The computer will continue to advance the timing until the knock sensor detects pinging. At that point the computer retards the ignition timing just enough for the pinging to stop.
The knock sensor responds to spark knock caused by Pre-detonation of the Air/Fuel mixture. As the flame front moves out from the spark plug ignition point, pressure waves in the chamber crash into the piston or cylinder walls resulting in a sound known as a knock or ping. This is caused by using a fuel with a low octane rating, overheating, or over advanced timing. Sometimes it can be caused by hot carbon deposits on the piston or cylinder head that raise compression. A knock sensor is comprised of Piezoelectric materials; Crystals that when impacted, generate a voltage (same idea as a BBQ ignitor). This voltage is monitored by the computer, and when an irregularity is detected, the computer corrects timing in VVT (variable valve timing) engines, or triggers a DTC Diagnostic Trouble Code) in older vehicles.
No. Worst case senario with a bad knock sensor is check engine light, and bad fuel economy. Also spark knock, which if not taken care of can cause excessive heat to build in the engine and cause premature failure.
In most cases corrosion will cause a knock sensor to go bad. The knock sensor can also be shorted out by an electrical surge.
It will cause it to run sluggishly.
The sensor is bad. A properly-functioning knock sensor allows the ECM to advance timing until it senses a knock. It then retards timing until the knock just barely goes away allowing for optimal gas mileage.
Crank angle sensor or coolant temprature sensor are the two favourites that will cause a non start
It could be the cause of the knock only if the gasket was bad and leaked out almost all the oil.
A bad sensor can cause the vehicle to shift at the wrong time or not at all.
Yes. Any faulty emissions control sensor, including knock sensors, will result in an automatic fail of any emissions control test, period. It doesn't even matter if your vehicle's actual exhaust emissions are within acceptable limits. In most cases, once it is determined that a sensor is bad, the test is ended immediately, and considered failed.
the motor could pre-detonate or "knock" that can cause damage
No all it is is basically a microphone to monitor for noise-nothing to do with the engine running.
I have a 240 and with the knock sensor unplugged it will still start so I would have to say no.
Perhaps--unless the sensor itself is bad.
If you run your rig with a bad knock sensor the computer will not be able to tell if or when your engine starts to knock (such as a rod knocking). That is if it isn't already cause the sensor is there for insurance. Make sure the sensor is bad and if so have it replaced asap. It is an expensive job cause you have to remove the intake to get to them (some engines have two under the intake). willyray3
A bad crankshaft sensor on a 2.3 Ford may cause the car to not start. A bad crankshaft sensor can crank, just not start.
yes, it is protecting the motor from damage.
The knock sensor retards the engine timing when there is a knock or ping detected. This will make the car a little sluggish. It is rare that the knock sensor goes bad.
Yes it can hurt your engine to drive with a bad knock sensor. The knock sensor should be replaced as soon as possible.
A bad engine temp sensor can do that.
If the sensor it'self is bad then NO.