not fireing on cyl 3 & 6 . I changed the ign coil. what's next??? on 1990 Buick LeSabre

rough idle-- so I changed the plugs & wires & coil. Didn't solve the problem. What's next????

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2 answers 2 comments
Double check the fireing order. Possible plug wire crossed.
What is the fireing order?
Your problem may be coming from the ignition module, I've seen it many times with those coil pack set-ups
thanks, I'll try it and let you know.