we have been having the bucking problem for a while now, changed numerous items including fuel filter, battery, egr valve, ect... goes away and comes back. uaually goes away after adding a fuel injection cleaner and it is only noticeable when the tank is low on fuel...my question is this: I see that a few people have suggested changing the fuel pump or cleaning the screen. Has anyone done this? Did it fix the problem. From reading I don't see that anyone has tried the fuel pump.
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