Misfire on my 3.4 on 2005 Chevrolet Impala

Had a slight misfire. Diagnosed to number 5. Put on a new coil pack and now it runs worse. New plugs and wires. Whats the deal? Could it be a bad new part?

by in Fulton, NY on March 17, 2014
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1 answer 2 comments
ANSWER by , March 17, 2014
Yes ,you need to do more testing ,try putting old one back in....
COMMENT by , March 17, 2014
I started it today and it ran fine. Idk what is going on with it. Been doing this stuff 22 years and never seen anything like this.
COMMENT by , March 17, 2014
Hahahahahaha,welcome to my world ,crazy rite ,now its fine?.