has high idle speed all the time
Jan 11, 2011 at 5:22 PM
Has high idle speed all the time
1991 ISUZU TROOPER
DAN HEATON
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Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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Hello,
It sounds like you might have a faulty idle air control valve (IAC).
The IAC controls the engine idle speed. Over time dirt and debris can cause the valve not to function properly. Which will impact the way the engine will idle. It can idle too low or too high or not idle at all.
https://www.2carpros.com/articles/engine-idles-too-high
Sometimes the IAC can be cleaned out to restore the proper functionality.
Here is a helpful guide on IAC service:
https://www.2carpros.com/articles/idle-air-control-valve-service
I have attached diagrams for your reference.
Please let me know if you have any questions.
Thank you.
It sounds like you might have a faulty idle air control valve (IAC).
The IAC controls the engine idle speed. Over time dirt and debris can cause the valve not to function properly. Which will impact the way the engine will idle. It can idle too low or too high or not idle at all.
https://www.2carpros.com/articles/engine-idles-too-high
Sometimes the IAC can be cleaned out to restore the proper functionality.
Here is a helpful guide on IAC service:
https://www.2carpros.com/articles/idle-air-control-valve-service
I have attached diagrams for your reference.
Please let me know if you have any questions.
Thank you.
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Nov 22, 2021 at 12:07 PM
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