EA82t - Knock Sensor?

BlackMale · Post by **BlackMale** » Tue Jan 10, 2006 4:40 pm

Could those of you that own EA82t’s could you please have a look and let me know if they have the knock sensor wired up? In my experience you will be looking at a white female plug behind the plenum (closer to the fire wall) but will be connecting directly onto engine block itself (is this clear).

I have not, or at least can not remember, seeing 1 being connected on an ea82t engine (and I have been lightly disputing with a mechanic that mine was never hooked up).

Actually I do not even know why these engines would need em?!?!

Who can enlighten me?
Thanks L8a...

Wilbur · Post by **Wilbur** » Tue Jan 10, 2006 4:48 pm

They work without them. Old motor had one until the plug broke off. New motor is all connected up.

BlackMale · Post by **BlackMale** » Tue Jan 10, 2006 5:54 pm

8O well there you go thanks Lightning

AndrewT · Post by **AndrewT** » Tue Jan 10, 2006 6:59 pm

but what happens when the engine develops a knock and the ECU doesn't know about it so cannot compensate?

Suby Wan Kenobi · Post by **Suby Wan Kenobi** » Tue Jan 10, 2006 7:34 pm

On a 4plug ECU it will throw a code at you for not having a knock signal if you disconnect or have a broken wire to the knock sensor on the block,as well it may fatten up the fuel mix as a precaution.

If you have a 3 plug ECU the knock is controlled separate to the ECU by a small box in the PS side or the dash. On earlier 3 plug setups Oz was the only country to have a knock sensor as we had really woeful fuel compared to the rest of the world at that time. Now we have better fuels and most turbo owners run thier cars on Premium it should not pose any real problem with motor death if operating at factory specs.

BlackMale · Post by **BlackMale** » Wed Jan 11, 2006 10:43 am

Yer its the 3 plug Oz thing and she is always on Hi octane. No probs for the last 10 years. Thanks for the info... just confirmed what i was already saying (DUMB-ARS mechanics).

stamp_licker · Post by **stamp_licker** » Wed Jan 11, 2006 3:18 pm

jaffa your tourer loom should be 4 plug .its a 89 right?it is not quite the same as 4 plug turbo but runs the motor just fine with out knock.

Suby Wan Kenobi · Post by **Suby Wan Kenobi** » Wed Jan 11, 2006 4:44 pm

I think with any standard L turbo setup the need for a knock sensor is pretty much not needed if you are keeping things pretty stock as a precaution run it on PULP and you wont have any issues.