I am fitting a second hand AFR gauge tomorrow...

After a bit of reseach think ive figured it out that i need to tap into the wire on pin no 5 on my ECU (1998 Terzo)

So my newbie question is; by tapping into the wire is it ok to cut and strip either side of the ECU wire and join my sensor wire on via the use of a chocolate box type connector? Sorry if this seems a stupid question its just that i don't want to get it wrong when messing around with the ECU.

 

should be soldered
.....make sure yer battery is disconnected if using a mains iron

 

Done mine like this

 

Thanks for the responses

 

i have a a/f ratio gauge in my newage. havent got it working. do i take my fed from the ecu or the lamda sensor? i have a sensor in the headers someones tries running it too but they said it must be a dodgy sensor but on the remap it was working. also i have no lamda in the downpipe/exhaust (as im now decat there is a wire that sits not connected)
someone please give me something to work off as i hate it when things dont work.
cheers

 

if its a narrow band sensor then you wont get accurate readings from the meter
you need a wideband sensor for an AFR gauge

...you can take the input from either ECU end or the Lambda end

 

where would i get a wideband from/put it where? cheers

 

I just temporarily put a wide band into the old lambda position (underneath of d/s headers)...though I believe they SHOULD go downstream of the turbo to minimise heat transfer/damage
its connected to a hand held AFR meter at the mo
(my meter has a narrowband output to send to the ecu)

do a search for sensors on the net: theres plenty of places selling them

 

cheers mate, so i get a wideband and place it in the headers slot and wire it straight to the gauge?

 

well thats basically what I did and it worked a treat
...just a reminder though: the manual for the meter suggests placing the sensor DOWNSTEAM of the turbo to minimise heat

 

dont have anywhere to put it in exhaust downpipe or exhaust system. may just give it up and pay a garage to sort it.
dont have a meter its just a plain gauge
cheers for your help mate

 

Fit the gauge, it will give you a fair idea of the afr. If you are that conserned then get it checked by a pro! What you got to loose?

 

lol its getting the gauge to work in the first place is the hard bit. its been mapped twice so ive no worries really its just i brought an afr gauge and i want it to work