2004 Chevy trailblazer rpm fluctuates when driving?

maykat87

New member
I have noooo idea what this could be maybe plug issues or plug wires? When driving the rpm gauge all of a sudden jolts up the vehicle does this short jolt forward the the rpm backs down and it jolts back it isn't violent jolts just noticeable right now any one kno what this could b from?
 
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