Post by
Axel Grungy »
https://forums.nicoclub.com/axel-grungy-u8570.html
Thu Sep 28, 2006 1:25 am
it could be either one of your orings got torn when you installed it (use lube LOL) or its just unburned fuel in your exhaust, (assuming your last injector got stuck open) that is just getting burned off.
If the car seems to be running fine, id just take it on a nice 20 min drive to get all that crap out of your exhaust. beleive me it takes awhile, i had the same thing happen to myself and i thought i seriously fVcked something up.