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nbc bad spark plugs?
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  1. 2.5 Liter Gas
    :mad:My wife's 2006 NBC is acting up. It has 50K miles. Recently it has started surging while driving. Going down the highway at 70mph, it will suddenly slow down then surge or chug back and forth a few times and then return to 70mph only to repeat this a minute or two later. It has done it...
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