2002 Mercury Cougar V6 dash lights dim while idling and car jerks while stopped.?

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princez131227

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I have a 2002 Mercury cougar 2.5L V6. When I am stopped at a light or sign the dash lights dim and the car actually jerks and feels like it is losing power. I have replaced the battery, spark plugs and wires. I just had a transmission rebuild 2 weeks ago. The car also jerks like it is losing power while I am accelerating. I have heard it is either the coil packs or alternator. Does this seem like a reasonable conclusion? Thanks for the help.
 
dash lights dimming could be belt slipping or bad alternator easy to have it tested any parts store just driv eit there and ask to check charging system and belt
 
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