Originally Posted by
95LSv
Is the cat ment to be broken in?? This new one I have had about 90 miles on it today before I failed and did worse than the old one overall... However it failed 15mph and passed 25 mph, just like before. I'm running the ngk v power plugs. Would you guys recommend bosch plugs? I'm also thinking of running "guaranteed to pass smog", the fuel additive. I have never used race fuel, I just run 91 octane. I'm out of ideas. So ANY help is appreciated. Thanx
I do not think the cat needs to be broken in. Once it gets nice and hot it should be ready to go. When my car failed at 79k it was at the dealership for about a week. They were doing everything they poss. could to get it to pass, short of giving me a new cat. Well eventually they slapped on a new cat and it passed w/flying colors that day.