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Rough idle

Tiny
RANDY LAWS
  • MEMBER
  • 2007 TOYOTA COROLLA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 149,000 MILES
Vehicle has a rough idle when engine warms up and stopped at red light or put into reverse idles below 800 rpm only in drive and reverse otherwise drives fine and idles fine. Has not stalled yet. Sometimes hard starting but does fire up on first crank. I replaced spark plugs also used Seafoam to clean injectors.
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Wednesday, May 2nd, 2018 AT 10:53 AM

1 Reply

Tiny
JIS001
  • MECHANIC
  • 3,411 POSTS
If there is no check engine light and your idle is very low to where it feels like it wants to stall out then I recommend you start by cleaning out the throttle body. If your RPM is between 650 and 750 RPM then you should be good. Four cylinder engines do run a bit rougher then a V6 or V8 engine. If it is a vibration you feel through out the vehicle and then I would recommend you check for a collapsed or broken engine mount.
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Wednesday, May 2nd, 2018 AT 11:37 PM

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