2000 Cadillac DeVille Q&A

2000 Cadillac DeVille Question: I have a misfire code, and i woild like to know how to determine if it's the ign

I remember putting gas in my car and it started to misfire. The check engine light blinks all the time. The car ran fine up until that point. Since then, I have burned that gas out and still a misfire. I want to know how to eliminate the ignition coil because I had plugs, and boots changed. -
Answer 1
SCAN CODES TO DETERMINE WHICH CYL TO START WITH, THEN SWAP COIL WITH ANOTHER CYL AND SEE IF MISS FOLLOWS THAT COIL IF SO MOST LIKELY THE COIL IS BAD -
Comment 1
How do you determine that the coil is bad? -