UPDATE:

I had my CEL come on again. For the record, this is the second time ever since buying these 1 year ago. It has gone approximately 1,367 miles since the first CEL appeared a few weeks ago. I'll reset it tomorrow morning and see how many miles I can go without a CEL.

 

^i didnt read through your whole thread so i dont know what youve done after the cel came on originally, but when my cel came on i put the car on a lift and found a cracked Berk HFC right at where the support bracket is welded to the cat... i too had the nismo exhaust at the time.

 

Recap: I have had 2 CEL's come on ever since installing these Berk HFCs about 11 months ago. When the first one came on (a few weeks ago), I reset the CEL and it stayed off until about 1,300 miles later. Then I reset it again and it came back on in 127 miles. Now I reset it again and it has stayed off. It's been about 150 miles, so I'm crossing my fingers.

Bryan at Berk Tech. was nice enough to send me stainless-steel muffler packing, which also includes 2 washers which I am assuming go between the O2 sensor and the bung. He told me to put about 1 cubic inch into each bung.

 

yea i would think that it should help out. i have had my cel on my car since my tp's been on my car and its been about 6,000 miles. lol im surprised that my cel hasn't gone out yet. and i have a rev up. the light doesnt even bother me anymore

 

Weird I didn't get the washers just the SS wool.

 

^
Have you put them in yet? Did they help at all?

 

Yep. My light has not returned at all.

 

Im gonna get around to doin this soon. I have the TP's, just never really cared. I guess Ill write up a DIY since some people are having trouble understanding the process.

 

Today the CEL came on again after about 250 miles. Now my next step is to stuff the bungs with the SS packing that Bryan from Berk sent me. I'll use the washers also.