i would def replace the rotor. i once had a 280e that i bought for $200. it would start up fine and idle nicely, even drive fine til it got warm then it would not run hardly at all. after changing everything under the sun from injectors to dist caps plug wires etc. it turned ou t that the new rotor was about 1/8" too short. and when the engine warmed up and the mixture leaned out it would nt fire.

so change the rotor and make sure it is the right length. dont know how to do that but if using a correct bosch unit yuou should be fine.

look at the dist cap. look at the contacts are they chewed away, is the center carbon point sorn away does it spring up into the top as it should?

good luck

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.