Shaking on 1998 Mazda B2500

I was driving down the street truck started shaking then check engine light came on. Gave a code that the 4th was misfiring. I changed all the plugs and witres and truck is still shaking and almost ready to die when at a stop light, When i step on the gas it tries to even itself out. What else should I be looking for?

by in Spring Hill, FL on April 22, 2011
1 answer 1 comment
ANSWER by on April 22, 2011
I would look to see if you have a secondary ignition issue or possible a mechanical (compression) issue. Neil Bilodeau SAF-T Auto Centers Wallingford, CT 06492
COMMENT by on April 23, 2011
Thank you I will definately try that I also noticed for the first time today that after driving it when I shut it off i smell i think (sulfur) the smell that you get after lighting a firecracker.
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