Pulsing idle at Stop signs and Red Lights

2001 SATURN L200
104,000 MILES • 2.2L • 4 CYL • FWD • AUTOMATIC
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CHUCKLHEAD05
  • MEMBER
  • 3 POSTS
My wifes 2001 Saturn L200 had a pulsing idle when she is at a stop sign or red light. When driving, the engine sounds fine. The spark plugs were replaced and it hasn't improved the idle.
Apr 15, 2015 at 5:13 AM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Have you checked for codes in the computer? Also have you checked for vacuum leaks yet?
Apr 15, 2015 at 5:18 AM
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CHUCKLHEAD05
  • MEMBER
  • 3 POSTS
No codes in the computer. I will check for vacuum leaks.
Apr 15, 2015 at 5:42 AM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Does it ever whistle like a tea kettle at idle?
Apr 15, 2015 at 1:06 PM
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CHUCKLHEAD05
  • MEMBER
  • 3 POSTS
No whistle,just a pulsing in the Engine.
Apr 15, 2015 at 8:14 PM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
You could still have a vacuum leak.
Apr 16, 2015 at 5:42 AM
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