Where is the knock sensor and how do you replace
The knock sensor is most likely ok you need to do a top engine clean to get the combustion chamber presure down so the knock sensor can ****** the timing enough to not knock or ping, You may not here the ping but the knock sensor does. Go to a GM dealer and buy a can of top engine cleaner warm the engine up and pull vacuum line off the back of the throttle body and allow it to **** the full bottle into the engine then kill the engine. let sit for 20 minutes hook up vacuum hose start the engine and rev it up to where it will still run let it run for 10 minutes till smoke clears out then take it for a test drive after you drive it 10 or 15 miles you should notice the check engine light not cumming on and the engine ill run smoother and the fuel millage will go back up, afterwords change the motor oil and filter to get rid of all the carbon down in the oil pan. If this does not fix it then change the knock sensor, it has 4 wires running to it and is on the side of the block left side. If you replace it be sure not to tighten it to tight if fact use a tork wrench to tighten it or you will break the ceramic disc inside the sensor.
Oct 09, 2009 |
2002 Chevrolet Silverado 1500HD