2001 Saturn SL1 engine knock

2001 SATURN SL1
120,000 MILES • 4 CYL • FWD • AUTOMATIC
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BUCKBUICK
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  • 1 POST
My daughter's 2001 saturn SL1 knocks when accelerating during warm weather, in the winter it doesn't. What could it be?
Apr 12, 2009 at 3:32 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the EGR valve if its not opening exhaust gases will not recirculate and cause the engine to detonate/ping called spark knock-
Apr 12, 2009 at 3:37 PM
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