ENGINE KNOCK

2001 Saturn SL1

Tiny

buckbuick

April, 12, 2009 AT 10:32 PM

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?

1 Answer

Tiny

rasmataz

April, 12, 2009 AT 10:37 PM

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

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Ignition System Test Guide