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Originally Posted by r_p_ryan
Important Question: Does it seem to be worse if the car has been sitting for two days?
I'd inspect the wires, cap, rotor, coil, etc for a loose connection. Trace the wire from the cap to the coil for shorts. I could see how a sloppy installation of this wire 15k ago would begin to cause problems if the insulation was getting scraped off. And the symptom could be the bucking too, since all cylinders would be momentarily effected and the buck would move the shorting wire.
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I really doubt it's any of those since they are all nearly new, but you never know. I'll check and report back.
I threw a couple bottles of Heet in there and filled up. Overall, the car *seems* to idle more smoothly, but I still get the occasional jerk and the car will still die backing out of a parking space or the garage if it isn't warmed up for a few minutes first.
I'm beginning to think my whole theory of this being related to fuel system is not correct. The occurrence at time of fillup may have just been a coincidence. I will be doing a full inspection sometime in the next week; hopefully I'll find something obvious.