Bosch Lambda Control unit?

Any one ever repair a Bosch Lambda Sond Control unit?
From a '82 volvo #0280 800 052.
This unit makes the lambda valve pulse wildly. With another unit it runs great.

But my wife wants it back in her car

If anyone knows anything on these units please let me know

Thank you

Hi

Here is a links on how a lambda works I hope it helps. If you have a circuit diagram on the unit it will be much simpler.
**broken link removed**

Ante :roll: