Mechanics

ENGINE KNOCK

2001 Saturn SL1

Noises problem
2001 Saturn SL1 4 cyl Front Wheel Drive Automatic 120000 miles

My daughter's 2001 saturn SL1 knocks when accelerating during warm weather, in the winter it doesn't. What could it be?
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Buckbuick
April 12, 2009.




Check the EGR valve if its not opening exhaust gases will not recirculate and cause the engine to detonate/ping called spark knock-

Rasmataz
Apr 12, 2009.


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