Idle Problems
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This is a discussion on Idle Problems within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hy I installed a 2005 wrx motor with around 25,000 miles on it in a 73 914 Porsche. The motor ...

  1. #1
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    Idle Problems

    Hy I installed a 2005 wrx motor with around 25,000 miles on it in a 73 914 Porsche. The motor set in my shot for about 14 months it has stock ecm and a customised factory harness motor starts and reves to 3500 rpm for about 15-20 seconds and then starts alternating back and forth on its own between 3500 and 1500 rpms could this be the iacv idle air controle valve the only code im getting is vss vehical speed sensor ive checked for vacume leaks any help would be appreciated.

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  3. #2
    The Default One SeattleJeremy's Avatar
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    Sounds like a cool project, but I'm confused. Punctuation in threads can be very helpful.

    Did you do the work, did your shop do the work, or are you the shop who is doing the work?

    Vehicle Speed Sensor - the ECU will give this code if the sensor isn't hooked up to a Subaru Transmission. You're likely using the 914 transmission with an adapter plate, so yea, just ignore this code.

    Verify all the vacuum lines are plugged in where they should be. If they are all plugged in, even in the wrong order, the vacuum test can pass.

  4. #3
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    idle problem

    I did the work in my shop at the house I'm not a professional just a gearhead.

  5. #4
    The Default One SeattleJeremy's Avatar
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    Quote Originally Posted by ventedrib View Post
    I did the work in my shop at the house I'm not a professional just a gearhead.
    Gotcha, right on, sounds like a fun project

    Hopefully some other folks will stop in this tread, and have some more input for you

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