Can a bad spark plug activate a knock sensor?
NO. if a plug fails completely the software in the car combined with the various sensors will (or should) detect the misfire, and work out that the o2 sensor reading are correct, there is indeed excess oxygen – the sensor has not failed.
Will a bad knock sensor cause a misfire?
There are several other symptoms indicative of a knock sensor problem. The vehicle will often shake or vibrate and misfire when the engine is started. The engine may emit strong exhaust and burning smells due to the detonation in the cylinders.
Can a crankshaft position sensor cause a knock?
Unfortunately, a crank sensor will not cause the engine to knock. This sensor helps the computer control ignition system timing, and has nothing to do with crankshaft operation, other that telling what position it is in. If the sensor is bad, or damaged, the engine will not run at all.
Do spark plugs cause knock?
If any spark plugs other than what is recommended by the manufacturer is used, it can cause the knocking sound you hear. The spark plug has a certain heat range, which means it withdraws heat from the combustion chamber. It’s also common for engine knocking to occur when the spark plug gap is not correctly set.
Why does my engine knock when I Turn on the ignition?
NOTE: Over advanced ignition timing can also cause the same thing. The engine computer controls ignition timing. As a result, ignition timing is not adjustable on today’s engines. The only way to change the timing advance would be to flash reprogram the (PCM).
What are symptoms of bad crankshaft position sensor?
Problems with the crankshaft position sensor will often present as problems with engine timing. If you think your sensor has failed, here are some common symptoms of a bad crankshaft sensor that can help you in determining whether or not it has failed. As the engine speeds up, there needs to be adjustments to spark timing and fuel injection.
Why does my car Keep Knocking on the sensor?
By tapping on the engine near the sensor is one way to test it. Next watch spark timing and/or knock sensor input on a scan tool. You need to see if it sends a timing retard signal. NOTE: Over advanced ignition timing can also cause the same thing.
How to tell if you have a faulty coil pack?
You need to use ohm meter to test the coil pack for continuity. Make sure you have the approximate ohm values for the coil pack. To find this information, research your car’s engine on the Internet or purchase a Chilton’s or Haynes manual to find out what the mega ohms reading on the coil pack should be. Coil Packs vs. Distributors