1999 Pontiac Grand Am motor thump

1999 PONTIAC GRAND AM
138,000 MILES • 4 CYL • 2WD • AUTOMATIC
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NUTTERBUTTER
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I have a 99 grand am and when i start i+, i+ makes this thumping or banging noise until fully started and idling. It sounds like the motors bouncing around. What could be causing this?
Mar 18, 2010 at 4:48 PM
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