my son changed plugs on his 98, in Florida. Driving home the car would not pull up hill and had radom missfires. He took the plugs out and they wre completely burnt up. Iridium plugs. What would cause
Did he set the correct gap on the plue which is .060 (In thousandths of an inch) Caution! Gap is not adjustable on certain plug brands. He could have not put the wires back the correct way, here the is firing order.
joemom makes a good point. Also have a look at this thread, owners that had that happen say not replacing wires at same time will cause it. New wires and another new set of plugs, problem solved according to those guy. http://www.v8buick.com/showthread.php?114927-Shorted-sparkplug-SC3800-Engine&s=168aea2f947e5b5f91afcd89ce2a003a
Glad everything is working now !
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