vtecmuscle
New Member
Hi. I have a 99 civic d16y8 and I've put an aftermarket full exhaust that consists of a 4-2-1 header, a high flow cat, and a cat back exhaust after the factory catalytic converter broke. As I expected after putting the high flow cat the Check engine light came on because there is no restriction on air flow and O2 sensor picks up everything. I've been driving with the CEL on for quite some times now but it is almost time for my emissions and I needed to get rid of the CEL in order to pass. So I did some research and found out that I can use spark plug non fouler to create an o2 sensor spacer to turn off the CEL. That's what I did and the CEL turned off. However, after putting the exhaust my o2 sensor on the high flow cat was facing towards the floor of the car and once I put the o2 sensor spacer, it is touching the body. Now the problem is all the vibration from the exhaust is transferring inside the car and I can feel it every time I press on gas. Now I understand the vibration could be good for the ladies who will be riding with me but since this is my daily driver it can be annoying as hell. So I was wondering if anyone else had this problem or still experiencing it. Can someone tell me how to get rid of this vibration without turning on the CEL again or getting a regular cat converter because I'm not looking forward to power loss. Your help is much appreciated.