try changing the cat. they plug up causing motor not to breath under thottle but will idle great....
PUT A GAS CAP LOCK ON! ..Someone is stealing your gas
They are replaced when they go bad.
If the oxygen sensors for the 1991 Chevy 4.3 is running rich when it is warmed up it is best to have the sensors replaced. Once the sensors are replaced this should resolve the issue.
Have you had your 4 oxygen sensors replaced? It turns out when they replaced my oxygen sensors, they were after market parts so the service engine light did not come and gave codes even though they were replaced.
Oxygen sensors don't have fuses. They either work completely or they don't, and it'll set the check engine light. They can only be replaced.
i want to put used rebuilt engine on 1990 integra but new used engine only has two sensors
No, they will need replaced if defective.
The trans may not be the problem. Depending on the car the mechanical linkages or electrnic controlers (computer) or sensors could be bad A competent mechnic with the right scanner can watch all this work and see the issue.
As far as I know they can not be cleaned. Must be replaced.
NO. there 2 different things / sensors.
Only ones that have failed.
Common results point to "You can not clean an O2 sensor, it must be replaced"