Rough idle

2007 TOYOTA COROLLA
149,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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RANDY LAWS
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  • 1 POST
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.
May 2, 2018 at 10:53 AM
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JIS001
  • ✓ASE Certified Mechanic
  • 3,412 POSTS
  • ASE Certified Mechanic
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.
May 2, 2018 at 11:37 PM
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