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If the engine misses or sorges will it throw a code on 2008 Pontiac Grand Prix

My car had 117.000 miles on it,so i replaced the plugs and plug wires now car jumping in rpms(200-300 rpms) took to a shop says transmission is the problem,did not start untill did the tune up

Asked by for the 2008 Pontiac Grand Prix
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The engine light is not on indicating a missfire
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1 more answer
Agree with #1