burns my lambda sensors,please help!

[Thanasis]

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 (+),i have checked the volts at idle and is 13.5v and the signal from the ecu 0.8v,so any help would be really appreciate.thanks in advance

Thanasis

[katana]

Not sure if this is the cause but most ecu's will switch off the fuel pump via the relay after priming then on again once engine running. Lambda's don't
like to be hit with exhaust when cold which yours is if powered from FP relay. Is the ecu on a separate relay? I'd try a feed from that and give the heater
about 10-15 seconds to heat before trying to start! Good luck!

[Thanasis]

Now i have connected the lambda sensor wire lines from the ecu like the original 4wd,but still the same!! thank you

[Thanasis]

i forgot,from the ecu line, after switch on have stable current,not like fuel pump reley!