When I bought my truck it was running with autolite plugs it was very rough in idle. I traded those for a set of Bosch +2 plugs and it cleaned its act up real quick.
This concludes my current statment
Robert Godshall
I have used 4404 Champion truck plugs in my '96 Disco - no problems yet, installed about 43kmi ago. Used 4405 on my '79 AMC360, and 4418 (IIRC) on a '72 Buick 350. Have never seen one with the eroded center electrode!
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