engine knocking

2002 SATURN SW2
150 MILES • 4 CYL • FWD • AUTOMATIC
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LEMMON
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  • 1 POST
2002 saturn / 4 cyclinder / 150,000 miles / knocking at idle only / could i just need plugs? / well maintaned car / sw2
Nov 14, 2010 at 7:58 PM
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DAVE H
  • ASE Certified Mechanic
  • 13,384 POSTS
  • ASE Certified Mechanic
Thanks for the donation .. much appreciated

The car is probably knocking at all speeds but gets quieter the faster the engine is turning .. I would have a tech look at the vehicle to determine where the knock is coming from .. I doubt it is just a bad spark plug ?
Nov 14, 2010 at 8:18 PM
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BMRFIXIT
  • ASE Certified Mechanic
  • 19,053 POSTS
  • ASE Certified Mechanic
If need a spark plugs engine would be running rough and have a misfiring codes
to have a knocking sound at idle check oil and oil pressure
check and make sure have the correct oil filter
Check belt and accessories driven by it
alos check Exhaust shield
Nov 14, 2010 at 8:20 PM
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