Hi all, i'm going to fit a knocklink and an afr to my95 sti. Has anyone got a link to the best fitting position of the knocklink sensor? i know its on the block below the intercooler but want to double check exactly where and what size bolt i need again. Also is it better to wire the afr into the ecu or straight to the lambda sensor? If it's to the ecu what wire should i connect it to and is this safe? as i dont like tapping into ecu wires.

Cheers Johnny.

 

See here for KL:

http://stefanostadal.homedns.org/car_mods_gauges.htm

AFR should go to the ECU IMHO.

You need to get a wiring diagram though, im not sure what wire numbers on your year.

Its quite easy though, and quite safe.

MB

 

Cheers M8, i'll try to get a wiring diagram then.

 

if u tell me your engine code and chassis code year (details on vin plate) i can tell u which pin on the ecu for a/f guage/ or email you the pic

regards
Rob

 

Sorry to hijack i'm trying to find the pinouts to my ECU too.
merlin2002 you have PM (with vin number etc)

Thanks
Franko

 

done m8

 

Merlin2002 YHM

Many Thanks

Franko

 

I wired my AFR to the wire that leads from the sensor and ultimately goes to the ECU. It was far easier to access without messing with the ECU wiring. It works a treat

 

Hope you wired to the right side of the loom, for when you have to replace the sensor

I just prefer the ECU as its not near any heat, and easier to run the wires. Technically, both are fine though.

MB

 

I was told I need to wire my afr direct to the battery -ve terminal and not to the chassis ground because it will give a wrong reading - is this true?...

 

Merlin, i've sent you pm m8.

 

Cinders, most will tell you that. Ive tried both and it didn't make a difference, but...

By going to the ECU, you are getting the same live / ground voltage as the ECU is seeing. The battery volts and ground will be slightly different IMO.

I also think its neater going to the ECU, as you dont have extra wires going round the engine bay.

There was a big debate about this a while ago, and the conclusion for me was that you would get more accuracy from actually using the signals / voltages that the ECU was seeing.

Hope that makes sense.

MB

 

MB -CHeers for the reply, I'll wire the AFR directly in to the ECU, plus it's an easy job as it's under the passenger footwell.

Just gonna replace my 02 sensor first!

 

Cheers for the info guys!

Johnny