I have a 1993 k1500 and the cat has fallen apart and no longer existed within the exhaust. It has some rust and leaks so I had a straight pipe put in place. I put a new O2 sensor in (OEM ac Delco) and the ecm isn't having it. Still throwing a light. It runs good but I'm afraid it's in limp or running rich. This truck only has 1 factory O2 sensor, and it was pre-cat. My understanding is it's used for fuel trim then so she can't be running right.
I'm looking to not spend the money and replace the cat. What are my options to not only get rid of the service engine light but to more importantly correct the fuel trim, leaving the exhaust at its current state?
I'm looking to not spend the money and replace the cat. What are my options to not only get rid of the service engine light but to more importantly correct the fuel trim, leaving the exhaust at its current state?