Hi,

 

I was lucky enough to get a consult at JAE by JeffTT, which when testing

we discovered i've got a faulty water stat which was jammed open, also he

noticed a knock sensor error when looking at the ecu which after was cleared

and it never came back up so we dismissed it - however I purchased a cable

to check the sensors myself and it keeps coming up so its likely is at fault.

 

Simple question ! - wheres the cheapest place to buy and were on the engine

is the sensor ?

The knock sensor is right on top of the block at the rear of the engine. To change it means engine out. Its sometimes likely that the cable to the knock sensor is at fault rather than the sensor itself. You can get pattent parts from MJP now or there are some on ebay.

You can try the resistor mod, which tricks the ecu into thinking its fine, although if you have any underlying problems, you could do more damage, but worth a try to eliminate the initial error code.

There is also a relocation mod, but there was a reason Nissan put it there in the first place, but a last resort if you dont want the engine out route.

 

I would check the connectors for corrosion, do a continuity test from the pins on the ecu. There is only one signal wire to the knock sensor, the other is a ground, although not connected to the plug, it acts more as a shield from what i can tell.

 

HTH

Graham

There is one here going cheap

http://cgi.ebay.co.uk/300ZX-TT-Z32-parts-KNOCK-DETONATION-SENSOR-plug-/380265953829?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item58899dfa25

Its not an engine out job; you remove the Plenum and lower intake to access it.

 

Most popular fix is to bypass it (resistor mod - http://zhome.com/ZCMnL/PICS/detonationSensor/detonationSensor.html) but you want to be aware of what that means in doing so to understand wether its the right choice for you, ask if you want more info.

 

Dont bother with relocation - waste of time and money.

Edited September 21, 201015 yr by Yowser

Its not an engine out job; you remove the Plenum and lower intake to access it.

 

Most popular fix is to bypass it (resistor mod - http://zhome.com/ZCMnL/PICS/detonationSensor/detonationSensor.html) but you want to be aware of what that means in doing so to understand wether its the right choice for you, ask if you want more info.

 

Dont bother with relocation - waste of time and money.

 

Well swapping the plennum next week for a polished one so i'll get it swapped then !

 

least i know where it is now, so i'll unplug and check the connection is clean.

 

cheers

You swapping bling bits too now lee :)

If youre swapping the plenum, get a new gasket lol.

As Dave said you can get to it by removing the lower plenum, you may as well get rid of the EGR too and do a plenum water bypass, the amount of stuff you need to take off its just as easy removing or lifting the engine to access it lol but if youre removing the plrnum anyway, youre half way there.

You swapping bling bits too now lee :)

 

Likely will be if its easy enough - I do like the bling and dont want to lose it.

Most of the plugs are obvious and will only go where they came out, but for peace of mind and ease of putting back together, i would label each one. Especially the injectors, depending on what type you have, the spring clips are PITA to get off.

There are a few write ups for plenum removal, just take your time lol