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Is the engine misfiring? What you're describing sounds like there may be a misfire either under full power or possibly even a constant misfire that you only notice when under full power. The usual recomendations apply. Connect a code reader appropriate for your vehicle/vintage and see what the computer says. Take care of any reported problems and see if the engine runs more smoothly.

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โˆ™ 2006-03-23 14:39:15
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Q: Why does 1999 Maxima hesitates or shake slightly when accelerating up to approximately 45-50 mph but does not when overdrive is off?
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