Quote:
Originally Posted by ewoolsey
Alright so i just finished installing my obx headers last night on my ls3 camaro and here are some problems I had. Any help is appreciated.
1. a loud noise when I back off the throttle at above 4000 rpm. its pretty loud and its a funny sound. don't know how to describe it. is it normal with headers?
2. rattle/bonking noise coming from the back. kinda sounds like the exhaust is bouncing up whenever my car hits a bump? where should i look to fix this?
3. When i took out my pre cat 02 sensor the threads like tore off? so installed it with a spark plug anti fouler. is that a problem? also is it bad to drive the car with neither of the pre cat 02 sensors plugged in? my extensions havnt come yet. thanks guys!
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1. Doesn't sound normal. Mine doesn't do that at all. Either a better description of the sound or maybe capture it on video for us?
2. My guess is that your cat-back is hitting the cross brace. You need to check to make sure there is clearance with your cross brace. If not you need to adjust your exhaust some and/or add some spacers to the cross brace.
3. WOW...I can't imagine the car would run good at all without the pre-cat sensors. That's what the computer uses to adjust fuel trims. IDK...personally I would really limit my driving with out the front O2 sensors. I definately wouldn't be hammering it until you get your O2 sensors back in.
Sounds like you're going to need to stop by a dealer and get a replacement O2 sensor for the one that's stripped out. That's not an uncommon thing