low idle
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This is a discussion on low idle within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; i have a 2001 with low idle speed. does this indicate a larger problem or can i just set the ...

  1. #1
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    low idle

    i have a 2001 with low idle speed. does this indicate a larger problem or can i just set the idle up?

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    Administrator Trainrex's Avatar
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    Quote Originally Posted by hilld View Post
    i have a 2001 with low idle speed. does this indicate a larger problem or can i just set the idle up?
    We didn't get a 2001 here, so you must be overseas. What is it idling at?

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    low idle

    the idle jumps up to 1000 and it runs fine but sometimes at a stop light it drops to 600 RPMs. it normally runs at around 800

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    Registered User rr1911's Avatar
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    how long has it been doing this ?
    also does this only happen with the ac on ?
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    low idle

    i just bought the car. when i bought it, it was not having this problem. i had the streering rack and an axle changed and now it is having a problem with the idle. i had the idle control valve changed yesterday and the idle still seems low to me. however, it is not cuting out at the stop sign. it idles poorly with the ac on or off. it idles fine in neutral.
    djh

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    Registered User 68sprintb's Avatar
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    do you have any experience using a DMM? you could check it yourself as the idle actuator is usually easy to get to.
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    i have the same problem with 02 wrx and i dont no what to do, mine idles at around 500 my friend's mr2 was doing the same and some mechanic just tightened a spring and it was fixed can u do that to wrx's as well?

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    low idle

    yes i know how to use a DMM. i do not know what or where to check.


    i don't know anything about a spring. as you can see, i am not much of a mechanic when it comes to Subaru's. this is my first one. i am sure i will get better.
    djh

  12. #11
    Registered User 68sprintb's Avatar
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    Quote Originally Posted by hilld View Post
    yes i know how to use a DMM. i do not know what or where to check.


    i don't know anything about a spring. as you can see, i am not much of a mechanic when it comes to Subaru's. this is my first one. i am sure i will get better.
    djh
    i've done it before on my 05 WRX, but it's probably similar to yours. anyway here ya go:



    you're looking for the IAC motor right on top of the throttle body. it'll have 3 wires going to it, you want the white one. gently insert a pin into the connector (still connected) at the white wire from the back and push it till you feel it hit metal and stop.

    then connect the black lead of the DMM to ground, and the red lead to the pin in the connector on the white wire. with the DMM set to VDC it should read 9-10 VDC at a hot idle. if you have it, use the dutycycle signal triggered low and it'll read about 30%.

    if that doesn't match, the IAC is typically attached to the throttle body and easy to see. attach a pic if you can, and we can go from there.
    Last edited by 68sprintb; 06-04-2007 at 01:47 PM.
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