Engine surges at idle when warm

Tiny
WMCANTRELL
  • MEMBER
  • 2005 KIA SORENTO
  • 6 CYL
  • 4WD
  • MANUAL
  • 150,000 MILES
I just purchased the car listed above and the engine surges when warm at idle. Also when you turn the heater on the engine races.
Thursday, April 7th, 2022 AT 7:56 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

An engine can surge for a number of reasons. It could be due to a vacuum leak, faulty mass air flow sensor, issue with fuel pressure.

Here is a helpful guide:

https://www.2carpros.com/articles/engine-surges

Many times, the engine can surge due to any engine management system sensor. Which will typically turn on the check engine light.

Is your check engine light illuminated? If so scanning and retrieving the code(s) can help with the diagnostics.

https://youtu.be/vMwTzURWXmk

Please let me know of any questions.
Thank you.
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Thursday, April 7th, 2022 AT 8:27 PM

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