Header with front o2 sensor

[NoSweat83]

I have a pacesetter header on my car and have been having 02 sensor problems. The codes that the car gives are a slow o2 read on the first o2. I am wondering if I need a aftermarket o2 sensor to make up for the difference in flow so I will not get a service engine light? Because the pacesetter has a 3 inch collector and if I am right our cars stock is 2 inch. Any input will be appriceated.

possibly you damaged the 02 sensor. I have a pacesetter on my car, and I have absolutely no trouble codes whatsoever.

[Fast Eddie]

where did you put the sensor? the jackasses that installed mine put it in the down pipe and I get codes damn near daily. The key for a fuel injected car is to have the upstream O2 sensor as close to the collector as possible.

180degrees from where the original 02 sensor bung was.

it's in the same spot, just flipped over on the opposite side..

It's likely just damaged then. If you can live with the codes just drive it that way because I think they can run about $50 or so for a new sensor. I don't know if there's any way to test if an O2 sensor is bad either..

Originally posted by Final-Reality@Apr 5 2004, 01:05 PM
It's likely just damaged then. If you can live with the codes just drive it that way because I think they can run about $50 or so for a new sensor. I don't know if there's any way to test if an O2 sensor is bad either..

that front 02 sensor needs to be replaced if it's damaged. That's part of how the car maintains good running order.

OBD2 cars have two o2 sensors, the important one and the emissions one.

That one is the important o2 sensor. The one the pcm uses to figure out the air/fuel mixture. It's not the only sensor used obviously but one of the main important ones. if it's not working right chances are other problems will follow.

[Fast Eddie]

What happens if the front one goes is the PCM goes into "safety" mode and runs real rich. long term damage to CAT, loss of power, and poor fuel economy. The sensor only cost $39 from the dealer for the heated one, not that much.

[NoSweat83]

I have got the problem solved. The tip of o2 sensor was sitting flush with the end of the o2 bung. So we trimed a little more than a .25 of an inch and no more codes.

When you extended the o2 sensor did you splice the o2 or the harness?