daveselwood

does anyone know which is the O2 sensor wire on an ofab ecu for a frst as im fitting a turbo timer that needs it connecting,(i havent got a manual yet)

Avinitlarge

It has a Co wire but not and O2 wire

daveselwood

the instructions say o2 but it calculates the theotrical a/f value from this o2 sensor voltage,it just says o2 sensor wire

Avinitlarge

Ah right, The FRST doesnt use a lambda sensor and to measure AFR properly you need a wideband lambda sensor

daveselwood

im not that fussed about measuring it properly,its just that the turbo timer needs it wired so it can run on auto if its not possible to find this wire i can preset the running time,

NEWTON

it need wideband lamda senor to do this dave,and there very expensive,like the one i have on the s1

daveselwood

this sensor youve got what does it do,just the turbo timer,will try and pop round tomorrow,might be going to tweeks on sat for some koni adjustables

NEWTON

i have that sensor cos i have moniter equipment for my air fuel ratio

daveselwood

can i just buy the sensor or will it need some control gear aswell

NEWTON

u can buy sensor but it cost over Ł100.00

kjc300

iTrader: (1)

This may be a daft question - but why does a turbo timer need a lambda input?? As the ecu should be trying to keep the AFR constant so what condition would occur to trigger the timer?? Surely, it's just to allow the engine to cool down after a run??

daveselwood

Ł does it come with acheque for Ł90, yeh but will it work with just the timer asi need this o2 sensor wire and an earth from the ecu for auto operation,does your timer work on auto

NEWTON

he wasts lamda input so he can use the auto time function

daveselwood

This may be a daft question - but why does a turbo timer need a lambda input?? As the ecu should be trying to keep the AFR constant so what condition would occur to trigger the timer?? Surely, it's just to allow the engine to cool down after a run??
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i think this is how the timer gets its information as how hard the car is driven,so it knows how long to run for

NEWTON

no it doesnt yet cos not wired it but im not arsed,wanna buy my s1 or what

daveselwood

he wasts lamda input so he can use the auto time function aled has got some lamba sensors will any do

NEWTON

you can use any one but wont be accurate

Avinitlarge

what turbo timer is it??

NEWTON

its one of those apexi ones that s like a pencil size

SafeChav

Nooooooooooooooooo

The apexi turbo timer monitors AFR. You don't need it to operate the timer, plus the fact, it only accepts a narrow band input, so its about as much use as a cock flavoured lolly pop anyway

NEWTON

i know the timer will still work,what daveselwood was asking was he want it to work in auto time so i thought you needed the sensor for that to work

SafeChav

nah....auto time usually works off RPM. And i wasn't aiming that at you, was just saying in general like.

My mates actually got one in his Silvia (Jap version of a 200sx) and it seems to give a fairly accurate AFR.....but....its narrow band so its not really accurate enough.

And to summarise, if you have a category 1 alarm a seperate turbo timer is a useless piece of equipment anyway

NEWTON

yeah i know what you mean about the alarm,i have to read the instuctions again,you know what i mean it works out the time on how hard its being driven cheers mate

daveselwood

heres the instructions if anyone can make sense of the co thing its been mentioned by someone whos pretty clued up that the wire im loking for might be the co potentionmeter https://passionford.com/forum/viewto...235472#3235472 or the instructions http://www.apexi-usa.com/pdf/product...tation/198.pdf

SafeChav

As i said, the Apexi turbo timers monitor AFR.

The O2 wire connects to the output of the lambda sensor, they just label the connection on the ECU end as its common to have the ECU inside the car, therefore easier to access. But as also said, its only a narrow band read out so in terms of accuracy its not very good.