lambda sensor and the dasc

[m3nut]

After fitting the new 3.4" pulley to my dasc, the lambda sensor packed up?

A few weeks back on the standard pulley I made a trip about an hour on the motorway (70-80mph) and was getting surging during light boost conditions.

Now the pulley has been fitted the first long trip (again same hour on the motorway) still got surging during light boost but this with time power loss??
Made it home, but by the time I got there it would not rev over 3k without total power loss!

The thing is I was associating the power loss with the surging as it seemed to be just after. The tick over was fine steady 700rpm

Got it hooked up on the code reader, and came up with o2 sensor as well as a long list including miss fire cylinder number 2/ maf ect.

The spark plugs were black and the lambda sensor was too. I have since replaced the sensor and the car is now running without any fault codes

But my question would be, have any of you guy's running the charger had problems with the car running rich and may be destroying o2 sensors or could it just be the extra boost has speeded up the faulty sensors life span?

I need to get it back out for a long run to see how it performs

[xxxJohnBoyxxx]

Originally Posted by m3nut

After fitting the new 3.4" pulley to my dasc, the lambda sensor packed up?

A few weeks back on the standard pulley I made a trip about an hour on the motorway (70-80mph) and was getting surging during light boost conditions.

Now the pulley has been fitted the first long trip (again same hour on the motorway) still got surging during light boost but this with time power loss??
Made it home, but by the time I got there it would not rev over 3k without total power loss!

The thing is I was associating the power loss with the surging as it seemed to be just after. The tick over was fine steady 700rpm

Got it hooked up on the code reader, and came up with o2 sensor as well as a long list including miss fire cylinder number 2/ maf ect.

The spark plugs were black and the lambda sensor was too. I have since replaced the sensor and the car is now running without any fault codes

But my question would be, have any of you guy's running the charger had problems with the car running rich and may be destroying o2 sensors or could it just be the extra boost has speeded up the faulty sensors life span?

I need to get it back out for a long run to see how it performs

How many miles on that O2 sensor you replaced? Yes the boost will heat up the O2 more and cause thing to fail earlier. I've heard a super rich tune can kill a O2 sensor but I have never done this before on my motor and I've run with AFR in the low 9:1 ratio, black smoke flying out the exhaust...

[m3nut]

The cars on 93k not sure if the o2 sensor has ever been replaced, if not then could just be age/mileage related.
After fitting it, I did give full beans (the sound with the new pulley was great) and did look in the mirror to see smoke behind. Does the ecu need more time/miles to learn now the o2 sensor has been replaced and lean out?

[xxxJohnBoyxxx]

Originally Posted by m3nut

The cars on 93k not sure if the o2 sensor has ever been replaced, if not then could just be age/mileage related.
After fitting it, I did give full beans (the sound with the new pulley was great) and did look in the mirror to see smoke behind. Does the ecu need more time/miles to learn now the o2 sensor has been replaced and lean out?

Delayed responce but yes the computer will learn or "adapt" to the correct AFR over a certain amount of milage and driving conditions. It is about 15 minutes of driving depending how far off the baseline you are at when you start with the new sensor

[m3nut]

Thanks for the replies Johnboy, took the car on the motorway today did about 20 miles and it was 100% better
Steady 70-80 seemed easier to drive, not wanting to keep revving and very little surging! Think the old sensor was duff to start with.