Dougs99GT

Alright i installed some longtube headers and an x-pipe with no cats. i have a predator tune and i can disable the rear o2 sensors...what should i do? why would you disable them? thanks for any help

2000AZ5.0GT

Stock cars have two sets of O2 sensors, one before the catylitic converter system, and a set after, so that it can monitor the fucntion of the cat's. When you switch to a longtube set up, you basically eliminate the rear set of O2 sensors, since you don't have any catylitic converters to monitor.

The stock computer however is set up to monitor these functions, and if you don't have the O2 sensors plugged in, it will trigger a code within the OBD system, and it will turn on the Check engine light.

Some people don't have a tuner, so they buy what are called MIL eliminators, which eliminate the rear O2 sensors, in a sense bypassing them, so they don't trigger the Check engine light, but since you have a diablosport, you can simply turn the rear O2 sensors off within the computer itself.