I think my O2 sensor just died.Will Link ECU continue to run the engine smoothly with a non functioning O2 sensor???My lambda link is showing 1st red light at WOT and all other time no lights.There are pops and bangs from the exhaust.

Car is MY98 fitted with Link ECU,Lambda and Knocklink.

Chan

You can turn lambda control off I believe - read the manual. The standard ECU runs OK without.

Chan
It depends who mapped the Link but as John says the Link ecu does not rely on signals from the O2 (lambda) sensor (which makes MOT time a problem if you have got rid of the original board!)
Exactly the same thing happened to me. When starting from cold I wait for the lamda link display to go to green before moving off (only as a short "warm-up" period to ensure full oil circulation) One day I sat there for 5 mins. before realising I was not going to get a display! The engine ran quite normally during the couple of weeks before replacing the sensor. As your sensor has obviously not completly died (red led) I would be tempted to get the sensor voltage checked to be sure the problem is not elsewhere eg fuelling as you say you are getting pops and bags (I assume they weren't there before?)
JohnD

[Edited by JohnD - 1/23/2003 6:21:04 PM]

Depends on who mapped it.

I would expect it to be mapped "open loop" which means it runs on a fixed map tailored to your car, so an inoperative O2 sensor will make no difference.

If the ECU has been left in closed loop, then yes it will affect how the car runs but only up to an extent, since if the ECU has to make extensive changes to achieve target, then it will limit the changes based on a percentage from the original map. It does this, for such an instance as a faulty sensor.

Providing these changes haven't been saved before switching off the car, the map will re-load to mapped settings every time it's switched on.

Alan :cool:

From what you have said the closed loop is on, you need to switch on ignition, don't start engine, turn it off then start car. Hopefully the map is reasonable otherwise it could still run badly.

Bob

Thanks for the replies gents.My lambda is always in the off position after Link is mapped.I do get occassional pops and bangs from the exhaust before and after the O2 sensor died.Guess I need to reduce fuelling for Zones 600 to get rid of the pops and bangs from the exhaust.

Chan

In that case all that is needed is to correct the map.

cheers

Bob