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I had an A&A supercharger, TSP headers and catless x-pipe installed in my 2014 stingray. The installer/tuner said that an O2 sensor went bad while he was road testing. He replaced it. I drove the car for about 3 hours and it was fine. Then, it started idling & running rough and the exhaust smelled of fuel.
Apparently others have complained about Texas Speed headers ruining O2 sensors repeatedly.
Can anyone explain why this happens and how to fix it?
How could it destroy the O2 sensor? The simple answer is moisture. A cold engine produces water vapor and if it pools on the O2, it will burn out quickly. This is particularly true of vehicles that don’t come up to temp regularly. This is why I always caution those individuals who start their car regularly during the winter but don’t get it fully up to operating temp thinking they are doing a good thing when they are doing quite the opposite. Have you ever noticed all that water that drips out of the exhaust when the engine is cold? Imagine what that is doing to the exhaust and O2 sensors if if is allowed to sit in the exhaust over time.
How could it destroy the O2 sensor? The simple answer is moisture. A cold engine produces water vapor and if it pools on the O2, it will burn out quickly. This is particularly true of vehicles that don’t come up to temp regularly. This is why I always caution those individuals who start their car regularly during the winter but don’t get it fully up to operating temp thinking they are doing a good thing when they are doing quite the opposite. Have you ever noticed all that water that drips out of the exhaust when the engine is cold? Imagine what that is doing to the exhaust and O2 sensors if if is allowed to sit in the exhaust over time.
Thanks, I can undstand this.
So the installinstaller road tested it. He said an o2 sensor went bad. He replaced it.
I drove the car easy until it got up to operating temp. Then, got it into boost a little. I basically just drove it for 10 minutes.
Then, I drove the car home. I stopped once along the way. I drove it about 200 miles. I got into heavy boost a few times.
it ran flawlessly. I got off the interstate, at my exit and it idled rough at the first stop light after. It then ran very rough on my 6 mile drive home.
It also smells of fuel.
It seems to be the o2 sensor but I havent confirmed. There is no code.
Does this sound consistent with what you describe or would your scenario likely take some time and several run cycles?
I would not expect a failure that quick. Perhaps the harness came in contact with the exhaust? Are you still running cats and which sensor(s) failed?
I just got home last night after the drive there and back. I haven't raised the car up to look. I'm assuming it's an o2 sensor, b/c he said one went bad already and it seems to be.
I'll try to look under it today. You may be right about the wiring harness.
I just got home last night after the drive there and back. I haven't raised the car up to look. I'm assuming it's an o2 sensor, b/c he said one went bad already and it seems to be.
I'll try to look under it today. You may be right about the wiring harness.
I have no cats.
If the o2 sensor is bad, you'll have a code. The only ones he should have programmed out are the rears. You may want to ask him what he turned "off" in the tune. If he did turn off the codes for the fronts, you'll need a scanner to see what the sensors are doing and then go from there. I doubt sensor orientation is making it go bad in such a short period of time / miles driven.
Texas Speed Headers bad O2 Sensor
