2007 Toyota Yaris Shaking when Idle

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?

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,867 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

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

JACOBANDNICKOLAS

MECHANIC
109,867 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

MURZYNSKI