Check for any leaks in vac lines ,intake ,make sure your air filter is clean
As far as I know they can not be cleaned. Must be replaced.
what sensors have you replaced?? i am assuming the oxygen sensors. i need a code number to tell you what is wrong. if its a p0420 its probabily the catalytic converter. mabye a p0141-mass air flow needs to be cleaned
They are replaced when they go bad.
They can be cleared, but will return if not repaired.
Two sensors, and replace them.
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.
Have the ABS computer checked. I have a 94 prelude and had the same thing happen. Have the ABS computer checked. I have a 94 prelude and had the same thing happen.
No, they will need replaced if defective.
I have a 98 mystique, and when the check engine light comes on, I simply disconnect the positive battery terminal for a couple of minutes. When I replace it, the check engine light is cleared. It resets the computer.
NO. there 2 different things / sensors.
Only ones that have failed.