Question about Toyota Land Cruiser

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Now idling at 1600 rpm and can not adjust more, what to do?

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  • Toyota Master
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Check the vacuum hoses, air leaks, idle stop screw and idle air control valve.

Posted on Dec 19, 2013

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Posted on Jan 02, 2017

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SOURCE: Idle shots up to about 1600 rpm when I start the

check your idle control valve located on the throttle body.

Posted on Nov 15, 2009

  • 44 Answers

SOURCE: high --1600 rpm ?? rpm

The normal idle speed is below 1,000 rpm...between 800 to 900 rpm. I suspect that the idle-air control motor has seized and can no longer automatically adjust the engine's idle speed. This part is also responsible for slightly increasing idle speed when the airconditioning is switched on to compensate for the added engine load. Some cars even have a "step-up" solenoid to increase idle.

When replacing the idle-air control motor, remember to clean the port that IAC motor goes into; there will be some carbon build-up that may prevent the part's cone-shaped valve from seating properly. A can of intake valve spray helped along with some Q-tips works well.



Hope this helped.

Have a great day !!!

Posted on Apr 07, 2011

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2 Answers

Idle speed for Kia Rio 2007 is 1600 RPM. How do I reduce this to normal 750-800 RPM?


If your Rio has fuel injection then you cannot adjust the idle speed.

The idle speed is controlled by the ECU and the Idle Speed Control (ISC or IAC) valve which is mounted on the throttle body.

You should not adjust the throttle stop screw on the throttle body - this is factory set and should stay as it is.

If you're having trouble with idle speed , then it's more likely that the ISC valve has fouled up and needs cleaning with carb cleaner.

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Most likely cause is your egr valve. Or a map sensor. They are both easy fixes.

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High --1600 rpm ?? rpm idle


The normal idle speed is below 1,000 rpm...between 800 to 900 rpm. I suspect that the idle-air control motor has seized and can no longer automatically adjust the engine's idle speed. This part is also responsible for slightly increasing idle speed when the airconditioning is switched on to compensate for the added engine load. Some cars even have a "step-up" solenoid to increase idle.

When replacing the idle-air control motor, remember to clean the port that IAC motor goes into; there will be some carbon build-up that may prevent the part's cone-shaped valve from seating properly. A can of intake valve spray helped along with some Q-tips works well.



Hope this helped.

Have a great day !!!

Apr 07, 2011 | 1992 Buick LeSabre

1 Answer

Idles rough till about 1600 rpm. tried injection pump. starts good


1600 is not idle speed my friend, 600 or 700 is idle speed. You need a tuneup on your 13 year old vehicle.

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Idle shots up to about 1600 rpm when I start the


check your idle control valve located on the throttle body.

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check automatic idle speed motor if equipped.

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please change the idling switch control valve assembly plus the sensor!

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