Quote:
Originally Posted by frack
Somebody, correct me if I am wrong, but when you install longtube headers you are placing the 02 sensors further down range which would cause the front 02 sensors to throw a code. This is because they are further away and take longer to heat up. Now your car is basically not detecting anything, because it does not have time enough to heat up. When you have the car tuned the tuner will delete the rears all together and basically tell the computer to wait longer so the front 02's have time to heat up. Sounds like tune problem. However, I have had 02's go bad during installs too. It happens. Usually, just one not two.
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This is correct. I spoke to my tuner and he said he had a brain fart and forgot to make this adjustment. So he will do that tomorrow.