2007 Toyota Corolla Making Pinging Sound After Runs About 20 Minutes Sounds

2007 TOYOTA COROLLA
68,000 MILES
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DAVEMIK1
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  • 12 POSTS
My 2007 Corolla is making a "pinging" sound after it runs for about 20 minutes. sounds like the last few kernels of popcorn popping or the pinging noise you'd hear from under the hood after you turn the car off. It only makes the noise when the car is moving, not when idling at a stoplight. What could this be? thanks.
Jan 24, 2013 at 5:10 PM
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SQM
  • ✓ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
Hello,

Is it possible to upload a video? So we can hear what it sounds like.

The typical pinging sound is due to improper engine combustion. Which typically happens when the air/fuel mixture combusts too early.

It usually sounds like a bunch of marbles in a tin can moving around.

Engine pinging can happen due to using incorrect fuel. If the fuel has a lower octane than the recommended level, then the pinging can occur.

Many times, this will turn on the check engine light.
If the engine light is on, it will be a good idea to scan and retrieve the codes as that will help with the diagnostics.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please let me know if you have any questions.
Thank you.
Dec 22, 2021 at 8:15 PM
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