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+1 on Dave N's post. I had spend hours debugging various engines behavior and finally in desperation I replace the cap and rotor, and all the weird problems vanished. My rule now is if I'm debugging 'spark', if the wires test out and plugs look good and I have spark direct off the coil, I just replace the cap and rotor.
Maybe some of the C&Rs still had life left in them, but IMO they are cheap vs. your time... and they do wear out.
Also, a few year back I bought new C&R (due to age) for my land rover (buick motor) and the engine ran worse. I returned them an got another set from a different brand and it worked fine. Asking my mechanic about my observation, the mentioned that there were a 'bad batch' of caps floating around about 6 months ago. We looked at a both "good" one versus a "bad" one and could see zero difference. But one clearly worked and the other did not.
I can now see how religions can start. ;^)
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Thanks,
Ron
Portland, OR
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