Stopping Engine Knocks: Troubleshooting Your Acura Legend Knock Sensor
A knock sensor's main function is a no-brainer-it senses bad knocks in your engine. This so-called listening device detects engine noises and vibrations caused by detonation, so expect your Acura to perform poorly when it goes bad. Detonation, when not properly addressed, can significantly decrease engine power and fuel mileage. It's the knock sensor's job to alert the ECU when detonation occurs so that ignition timing can be adjusted properly and engine efficiency can be restored. Like all other sensors in your Acura, the knock sensor may also wear out and malfunction over time. If you're having problems with your Acura Legend knock sensor lately, it would be best to perform some troubleshooting to save your engine from further damage. Below is a guide to help you out:
Decreased engine RPM
If you're experiencing slower engine acceleration, one of the probable culprits is a knock sensor with a wiring short. A faulty circuit can affect and slow down the engine's revolutions per minute, resulting in loss of vehicle power. To check the knock sensor for bad circuit, perform a visual inspection on the connected wires. Have a mechanic test broken or frayed wires against normal generated resistance and compare the readings with the sensor's factory specifications. If the readings do not meet the specs of your Acura Legend knock sensor, then you must replace these faulty wires right away to restore acceleration power.
A bad knocking sensor will produce knocking or pounding noises in the engine that becomes louder and more noticeable over time. The noise can be heard under the hood when you're going at high speeds, and it usually comes with vibrations. Engine knock can be severely damage several crucial components, including spark plugs, pistons, gaskets, valves, and connecting rods. Aside from wreaking havoc in your engine compartment, engine knock can also decrease your vehicle's fuel mileage. To test the knocking sensor for damage, hit the intake manifold using a crescent wrench. The manifold's located at the center of your engine, right above the knock sensor. By striking the manifold, you'll create a detonation that should cause the knock sensor to adjust the timing. The engine will then make the necessary adjustment and create a sound different from the one it usually produces. If you don't hear any difference, your knock sensor is indeed faulty and should be replaced immediately.