The lack of oil?!?
And engine knock is normally caused but I worn crankshaft bearing or rod bearing.
bad bain bering
It is not required for proper running of the engine.
The engine will have a distinct "Knock" while running.
The knock sensor on the 1996 GMC Jimmy 4-wheel drive, 4.3 liter 6-cylinder is mounted in the engine block. Under the hood, look in the lower engine area on the passenger side, beneath the cylinder head.
Engine knock happens when an unbalanced air and fuel combination occurs inside of an engine cylinder. If the problem is not corrected the vehicle runs the risk of having a piston malfunction.
2000 jimmy 4.3ltr v6. were is the o2 sensor bank 1, sensor 3
Low octane fuel, timing to far advanced, overheating.
Not enough oil or a spanner in the works.
Tap the block or head with a hammer while the vehicle is running. If the engine slows down as you are doing this, it is sensing "knock" and trying to compensate by retarding ignition timing. Tap the block or head with a hammer while the vehicle is running. If the engine slows down as you are doing this, it is sensing "knock" and trying to compensate by retarding ignition timing.
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.
If it is more of a ping than a knock then just try running some higher octane fuel in it. If is more of a knock it could be a rod or crankshaft bearing. If it is definitely a knock you should get it looked at right away.