2007 Toyota Yaris Shaking when Idle

Tiny
MURZYNSKI
  • MEMBER
  • 2007 TOYOTA YARIS
  • 1.5L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 176,000 MILES
My Yaris had a dead battery for about 7 days before I got it replaced. And when I was driving it to work, it would start shaking and seemed like it might stall on me when I was idling at a stop light. It seem to take just a tad bit longer to accelerate than usual too. Could this be an Alternator issue?
Friday, May 30th, 2014 AT 10:32 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Has the check engine light come on? Has the new battery gone dead? Is the battery or alternator light on?
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Friday, May 30th, 2014 AT 2:58 PM
Tiny
MURZYNSKI
  • MEMBER
  • 3 POSTS
Hello,
The Battery, Check Engine, and Alternator Lights are not on. Battery is still good. The car just shakes pretty rough when idle, but when I pop it into Park it's fine.
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Friday, May 30th, 2014 AT 3:07 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
A rough idle can be from many different things. However, most commonly it is caused by a vacuum leak. Have you checked for that? Also, since it runs smooth when you place it in gear, check the idle air control valve (IAC). The IAC is responsible for maintaining the engine idle speed.
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Friday, May 30th, 2014 AT 7:39 PM
Tiny
MURZYNSKI
  • MEMBER
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Good call. I haven't checked the IAC, I'll give a shot. Thanks.
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Friday, May 30th, 2014 AT 8:19 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Let me know what you find.
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Saturday, May 31st, 2014 AT 8:54 PM

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