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I have been checking everything. The problem doesn't seen to be n the ignition. When I unplug the o2 sensor the bucking/hesitating stops completely. The problem is that with all the hesitating and bucking, which I assume is some kind of misfire, I get no CEL's. I get one of course when the o2 sensor s unplugged. Is there some way to check the o2 sensor without having to roll the dice. I do remember when I first drove the car I did get a code for insufficient egr lift. I took the egr off soaked it in pb till it moved freely and haven't had the problem since. Could this have something to do with it.
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