I did some testing on different sensors on Saturday and the only thing I found for sure was a broken wire going into the distributor. I soldered a new piece in there but this morning it stilled was surging. I have changed plugs, wires, fuel filter, and air cleaner all within the last six months. The cap and rotor have no carbon tracks, pitting, cracks or scoring at all so I haven't bothered to change them yet. I don't have a vacuum gauge but I want to get one.
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