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Chevrolet Spark

Tiny
MICHELLE BOYD
  • MEMBER
  • 2012 CHEVROLET ASTRO
  • 1.0L
  • 4 CYL
  • 2WD
  • MANUAL
  • 46,000 MILES
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.
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Wednesday, April 5th, 2017 AT 6:51 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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.
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Wednesday, April 5th, 2017 AT 7:00 AM
Tiny
MICHELLE BOYD
  • MEMBER
  • 2 POSTS
Thank you very much I will try these and see fingers crossed.
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Wednesday, April 5th, 2017 AT 7:03 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,940 POSTS
Please let us know what happens.

Best, Ken
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Friday, April 7th, 2017 AT 11:48 AM

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