High idle

Tiny
BIGFISHONE
  • MEMBER
  • 2009 MAZDA 3
  • 2.0L
  • 4 CYL
  • 2WD
  • 225 MILES
Engine idle high when in park.
Saturday, November 23rd, 2019 AT 10:22 AM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

A high or "searching" idle is usually because of an engine vacuum leak. A vacuum link is described as any unmetered air that enters the engine from the Mass Airflow Sensor [MAF] to the engines combustion chambers. This includes the air intake tract, throttle body, intake manifold, vacuum hoses, PCV valves/hoses/ EVAP hoses, and Idle Air Control [IAC] hoses. Here is a link below explaining how to check your vehicle for vacuum leaks more thoroughly below:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please go through this guide and get back to us with how everything turns out and what you are able to find.

Thanks,
Alex
2CarPros
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Saturday, November 23rd, 2019 AT 1:36 PM

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