1993 Cadillac deville sedan 1986 cadillac deville RIP
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1,498 Posts
I got my car smogged about 2 years ago and I passed but I was close on one of the numbers. I want some of the secrets to pass smog. I know you put gas cleaner in it and you run 89 gas in the car a couple days before and to go with the car warm and not recently started, and to change the o2 sensor filters which I changed 2 months ago. A oil change, but does the brand or quality of the spark plugs have anything to do with it. Any other suggestions that I haven't wrote could help. Thanks