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The knock sensor on Nissan 300ZX non-turbo from 1990 thru 1996 is located below the lower intake manifold on the rear of the engine block. To replace the knock sensor the upper and lower intake manifolds need to be removed. It is always best to replace the knock sensor with a new one considering its major dissasembly.
It is in the trough below the EGR and intake manifold alongside the water bypass tube. Be careful with it if you take it out as they appear to be expensive.
It is in front of the starter on my van.1990 350
Located in the back of the engine on the driver's side next to the O2 sensor connector.
it's located under the intake manifold. the knock sensor is most likely ok' the porblem is the short wiring harness from sensor to main wire harness.
my 1990 300zx is idling rough what could cause this?
oil pressure switch or knock sensor
Looking at the engine on the right ride. Its going to be the round object where the timing cover stops on front of the engine.
It is screewed in the engine block over by the starter.
there is none
Attached to the middle of the engine block right underneath the lower intake plenum, roughly half way between the heads.
The knock sensor on a Chevy Celebrity 2.8 L engine from 1987 thru 1990 is located on the back side of the engine(next to the firewall) below the exhaust manifold. There are actually two sensors there, one is the knock sensor, the other is the crankshaft position sensor. The knock sensor is threaded into the block with a pipe thread, the crankshaft position sensor is held in with a 10 mm screw and is near the center of the block. They are both accessible with the engine in the car, but they are a bit of a pain to get to.l