wbzautocus

I have been looking for service info on knock sensor and starter work, found tis info but i was wondering if anyone had specfic info pages availible for veiwing wanted to look into the repair to see whats involved without purchasing a membership that will expire on a purchase before i actually get a chance to do the work u know procrastonation, etc haha thanks in advance all caps dont mean nothin just was lock on lol

dicer

AND NO YOU DO NOT HAVE TO REMOVE THE INJECTORS, just the wires to them. Leave the injectors and rail in the lower intake manifold. Just lift it easy and don't set it down on them.

wbzautocus

On a 96 ls400 I am going to take apart to check knock sensor and harness my question is if there is a problem with the harness is it find the obvious "grounded/exposed" copper and repair/insulate? or replace the harness itself?

Yamae

The knock sensor is a kind of a ceramic microphone with a built in resistor which makes it possible to be checked by the ECU since the ceramic is not conductive. The resistor also makes it possible to reduce the interference.

You can check it connecting to an audio amplifier with a speaker/headphone. Listen to the sound and compare with the other side one or use an oscilloscope. The harness can be checked easily by an ohm meter.

isfdude

iTrader: (11)

I'd replace the harness. You don't want to do it twice.

wbzautocus

Wanted to see if getting to the knock sensors harness to check for open/short are accessible without removing intake? I really want to check the basics before I start some major work or purchase unnecessary parts. On another thread I had a message that knock sensor can be removed with access after EGR ***. is removed for access for removal. Thanks

wbzautocus

I will if need to just want to find problem first before I start throwing $$$ and parts

wbzautocus

okay info appreciated

dicer

I suppose you could check from the ecu plug back, you will need the wire diagram of course.

PureDrifter

iTrader: (10)

the TSRM has diagnostics you can run from the ECU plugs for the sensors, otherwise no.

isfdude

iTrader: (11)

From my experience it's either rats eating away the wire or the sensor goes bad.

python

iTrader: (4)

3 threads about basically the same issue?

isfdude

iTrader: (11)

Sometimes different parts go bad around the same thing failing. Lol