What is your question?
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What is your question?
I took my friend 2003 trailblazer which is running with a miss to auto zone, and they hooked up their diagnostic reader to determine that the No. 2 cylinder is misfiring. I replaced the coil pack and the car still runs with a miss. The car has between 70-80 K on it.

2 Replies
Hello, Normally, in situations that warrant a coil change, we inspect the ignition elements that are relevant to the specific cylinder. Have you checked the ignition boot/wire and the spark plug for that cylinder?
You could try a coil pak since there is only a miss on one cyl. recommend spark plugs
Thanks.