Chevrolet Spark

2012 CHEVROLET ASTRO
46,000 MILES • 1.0L • 4 CYL • 2WD • MANUAL
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MICHELLE BOYD
  • MEMBER
  • 2 POSTS
When I'm sitting idle at a red light the car it like kicks I call it a heartbeat but it is getting worse have had it plugged into a computer and nothing is showing up there's no lights on either . Have put a catalalage converter cleaner through it and made no difference no one has any idea what it could be. I can feel it under my seat when it happens when driving it's fine it's only when I'm sitting idle.
Apr 5, 2017 at 6:51 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
try cleaning throttle plate o both sides and iac hole with choke cleaner they get gummy and do all sort of screwy things normally at idle. then check for a vacuum leak or air leak like duct work leading to engine and grommets cracked or broken on engine.
Apr 5, 2017 at 7:00 AM
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MICHELLE BOYD
  • MEMBER
  • 2 POSTS
Thank you very much I will try these and see fingers crossed.
Apr 5, 2017 at 7:03 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Please let us know what happens.

Best, Ken
Apr 7, 2017 at 11:48 AM
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