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Showing results for tags '2005 sts v8 4.6northstar'.
I have an 05 Cadillac STS v8 northstar. 112,000 miles. I started yesterday got a cylinder 5 misfire. I pulled cylinder 5 and on the spark plug there is a little oil. I haven’t pulled rest. Should I? What is the cause of this also noticed a rotten smell from exhaust. What should I do first and cheapest. Thank you.