Hello to all,i have a sierra 2wd cosworth with closed loop program from MSD but it burns the lambda sensors,already fitted before 3 days a new one and now is damaged,i have followed msd instructions, the black wire to ecu Signal,and the 2 whites,the one in earth and the other in fuel pump relay (+),but i don't know if the whites are the same or not...so any help would be really appreciate.thanks in advance

Thanasis

 

As long as the Black Signal wire is wired to the ECU it doesn't matter which way round the White Heater wires are wired up as long as one is +12V and one is Earth.
Rich

 

so the connections are correct....but burns the sensors

 

Might be worth giving MSD a call and talking it though with them mate.
They are very helpful guys.
Rich

 

i can't speak English lol,my English is not very good.i hope to see my thread and respond,thanks you

 

Another thing worth looking at is the 12v live you are taking off the fuel pump relay is that the permant live and not the switching live off the relay?
You really want a live that comes on when you start the car and only goes off when you turn the car off again.
Pin 20 from the ECU would be the ideal as this is where the lambda sensor takes its power from on L8 ECUs
Rich

 

here my connection(black/red wire) from fuel pump relay,thank you:


how to screen capture

 

I'll check mine when I return to UK in a couple of days, I've just done mine.....

 

Thanks pal!

 

Black and red wire goes to amal valve and fuel pump relay id change this one.....



you should have 3 wires on the lambda which go to,

Pin 2

Ground, pin 1 or 19.

The other connectes ecu relay pin 86, which is also shares pin4 on your ignition amp and coil.

 

Hello, i replaced the wires,and i connected the pin 19 from the ecu plug the one white and the 20 pin the other white wire,and the black(signal)to the pin 2,so i recieved the two lambda sensors i fitted the one but in a few minutes broken again! i don't know what is fault! maybe the alternator? i checked the battery with multimeter and i have 13.4v at idle,thanks for your interesting.

Thanasis

 

I'd be in contact with MSD and ask what the colours of the wires are on the sensor itself then go from there

 

there is one black and two whites it is simple,but i'm wondering if the lambda is too closer on the exhaust housing and burns the sensor from excessive heat,and need to far away from there!!

 

I've seen them fitted a million times on the elbow on the downpipe and the later 4wd has it fitted to the turbo housing itself, where's yours?

 

Here mate,


screen capture

also read here:
http://www.ebay.co.uk/itm/Long-Lambd...item19de687d63

 

Ι changed the cable lines to the ecu plug,and i removed the sensor far away from down pipe,but the problem still there!i don't know what is the fault!!any idea? thanks

 

Burnt how? Put a pic up of the damage

 

i have tested with this way as the follow video and doing the same!