Question about 1995 Mitsubishi Mirage

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IAC VAlve on 2001 Mitusbishi Mirage DE 2 door 145,000

My Service Engine Soon light came on today, so I took it to the Gas Station they told me that the code P0507 ment that I have an Idle Control Problem (my RPM's are to high) and if the problem persisits, I should replace the IAC Valve...My car idles Very smoothly when it is started..Just when I start it in the cold the first time the engine races.....Then mellows out once warmed....Reading a few things about this..It says I should get it cleaned or check the vacum hose..Any suggestions? I did get a tune-up 3 weeks ago

Thank you

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  • drgnldy2007 Feb 18, 2009

    my engines idle goes up and down starting at 1000 rpms, up to 1500 rpms and back down and back up, constantly. ive been told i need to clean it but where exactly is the unit under the hood so i can clean it?

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I would try to clean the IAC with a little CHEMTOOL and see if that helps first.

Posted on Feb 07, 2009

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3 Answers

COULD THE GAS PEDAL CABLE CAUSE THIS CODED PO507 to be high


Extracted from Engine-Codes.com

Code P0507

Possible causes

- Dirty throttle body

- Electric throttle control actuator misadjusted or damaged

- Faulty Electric throttle control actuator

- Intake air leak

- Poor electrical connection to the Intake Air Control (IAC) valve


help.jpg What does this mean?

Tech notes

If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. If the code comes back you may have to replaced the Electric Throttle Control Actuator (Motor) to repair the problem.



There is a factory service bulletin for the following Chevrolet models:



2006-2008 Chevrolet Trail Blazer

2007-2008 Chevrolet Avalanche

2007-2008 Chevrolet Express

2007-2008 Chevrolet Silverado

2007-2008 Chevrolet Suburban

2007-2008 Chevrolet Tahoe

Chevrolet Factory Service Bulletin OBDII Code P0507


What does this mean?

When is the code detected?

Thi P0507 code sets when the Powertrain Control Module (PCM) detects an engine speed outside of the Idle Air Control (IAC) valve range of control.

Possible symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

- Engine hard to start

- Rough or erratic idle speed

P0507 Chevrolet Description

The Idle Air Control (IAC) valve is a Powertrain Control Module (PCM) controlled stepper motor located on the throttle body. The stepper motor drives a valve pintle which protrudes into a passage that bypasses the throttle plates. The PCM commands the IAC valve pintle to extend to decrease the idle speed. The bypass air flow is reduced and the idle speed decreases as the pintle approaches its seat. The PCM retracts the IAC valve pintle away from its seat to increase the idle speed. The retracting of the IAC valve pintle allows more air to bypass the throttle plates. One of the PCMs uses for the IAC system is to maintain a desired idle speed. This DTC sets when the PCM detects an engine speed outside of the IAC\'s range of control.





Read more: http://engine-codes.com/p0507_chevrolet.html#ixzz3ObdI2chF

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