Usually a bottom end bearing problem mostly caused by lack of oil changes or high mileage on engine. You can try to replace the bearings but usually it's a temporary fix at best as there is probably crankshaft wear.
Under the exhaust manifold.
LS does not have a knock sensor. GSR does have a knock sensor
The knock sensor is located under the intake manifold on the passenger side of the engine. It can be accessed from under the vehicle. Look above and to the slight left of the oil filter on the back of the engine. The knock sensor will resemble a small battery terminal with a bolt through to the engine.
knock sensor is going bad or is bad
The knock sensor just advances and retards the engine timing only. If there is a noise in the engine then you have engine are valve train problems. The knock sensor will not make the engine knock.
This is controlled by a knock sensor.
I have a recent engine knock on my 91 escort started out intermittant. I have a recent engine knock on my 91 escort started out intermittant.
Disconnect the negative battery cable.Drain the engine coolant into a suitable container.Unplug the sensor connector.Using the proper size socket, loosen and remove the knock sensor.To install:Carefully thread the sensor into the engine block.Tighten the sensor.Attach the sensor connector.Refill the engine coolant.Connect the negative battery cable.
NO it will not. If you have a knocking sound then you have trouble inside of the engine.
Check the 91 Legend for a bad knock sensor. Check the timing for proper setting, and check for any vacuum leaks.
knocking as in spark knock? or engine knock? spark knock is adjusted through a knock sensor via ignition timing. eng. knock is due to brg. knock as in low oil pressure or sluge in engine or just a tired motor