If I got a set of headers with out EGR and didnt hook up the AIR and the back two O2 sensors, and didn't have the time or the money to get the car tuned and those codes tuned out. Would the car run like crap with those codes showing up? I'd plan on getting it tuned. Just wouldn't be able to do it right away. I didn't seem to see anything about how the car would run. Read stuff about getting those codes tuned out.

 

Car will run fine, just give you an engine light...

 

Thx for the response. Appreciate it.

 

I did the same thing...deleted egr/air, removed rear o2's, no tune. My car fouled all 8 plugs within 2 weeks. Now, I don't know if this was the result of the egr/air/rear o2 delete, or the computer just didn't adjust well to the new airflow. But I just went ahead and got a Frost Tune (great tune btw) and that solved my problem.

In summary, you will probably be okay for a while without a tune as long as you don't romp on it.

 

Did you reset the computer when you deleted everything? I unplugged mine overnight and plugged it back up the next day and I think that help with the computer dialing everything back in. I think its like a 50/50chance though. If you can afford a tune I would get one but if not like said above just don't go around driving aggressively.

 

Ran mine untuned for 8 months. No issues, just pulled the plugs a few days ago, none fouled. Never unplugged my pcm either. Now its tuned though.