think the plugs are the problem, unless there is something wrong withthem.

ie wrong gap, broke poecelain while installing, loose or damaged plug wire. i would examine the plug wires carefully especially the connections to the plugs to see if you might have damaged one while r and r. then if that reveals nothing take the plugs out and look for cracked porc. and check gap.

when i had a 300e 2.6 i am sure i used platinum plugs with no prob.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.