Something is wrong w/ my STI please help.
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This is a discussion on Something is wrong w/ my STI please help. within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Drove about 20 mins from my house into town then noticed that the car was running very rough at idle ...

  1. #1
    Registered User Venom351R's Avatar
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    Something is wrong w/ my STI please help.

    Drove about 20 mins from my house into town then noticed that the car was running very rough at idle and my check engine light came on along w/ my cruise control light blinking on and off. When the car is at a stop it shakes as if it has a huge cam in it and just sounds like crap. I took a video w/ my phone but it wont up load to my photobucket I'll keep trying.

    My car has 92,000 miles on it all stock no mods and I got gas a few days ago so I know its not that.
    2007 WRX STI- Stock 13.8@102

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    Registered User Cade06WRX's Avatar
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    The Cruise control is just blinking because of the CEL. It automatically does that. As for the rest idk.

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    Registered User Venom351R's Avatar
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    I'm going to check the MAF to make sure its not dirty then look for any lose connections under the hood if I cant find anything I might have to call the dealer and have it brought in. I hate dealer fee's but its also under warranty as well from where I bought it from so if it falls under that category then id be fine
    2007 WRX STI- Stock 13.8@102

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    Sammich Makin' Pwincess wrxtreme06's Avatar
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    You need to get the code read. Unfortunately the CEL could be anything. Autoparts stores should be able to read it for free

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    Registered User Venom351R's Avatar
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    I'm taking it to autozone now, they do free scans. I'll post what I come up with after I find out.
    2007 WRX STI- Stock 13.8@102

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    Registered User Venom351R's Avatar
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    137, 18, 302, 304
    2007 WRX STI- Stock 13.8@102

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    Registered User Venom351R's Avatar
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    And 21
    2007 WRX STI- Stock 13.8@102

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    Registered User LogiMech's Avatar
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    I think 137 has to do with the 2nd O2 sensor. 302 and 304 are mis-fire codes?? pull a your plugs and see how they look, have you ever changed them?

  10. #9
    zax
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    IMO the commonality here is the P0018 -- Crankshaft position sensor failure.

    If the Crank position is incorrect, the car will fail to inject fuel and spark at the correct moment, and you'll get both a misfire code (which you've posted) and a system rich/lean code (which you've posted). I'd first check the Crank position sensor (under your alternator). It could be loose. I'd also check your camshaft position sensors to be sure it's not correlated from the cam sensor.

    At worst, your timing belt skipped a notch. With 92k miles, is it safe to assume you've not changed your original timing belt?
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    Registered User Venom351R's Avatar
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    No it has not been changed bc the dealer did not recommend it until 105,000. I have no idea where rent sensors are you mentioned
    2007 WRX STI- Stock 13.8@102

  12. #11
    Registered User Cade06WRX's Avatar
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    I would say a timing belt change is in order for you as well. If the car has been driven hard throughout the years it may need changing at 92k miles instead of 105k

  13. #12
    Registered User Venom351R's Avatar
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    It has not been driven hard at all it very seldom sees over 4K RPM's
    2007 WRX STI- Stock 13.8@102

  14. #13
    zax
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    Quote Originally Posted by Venom351R View Post
    No it has not been changed bc the dealer did not recommend it until 105,000. I have no idea where rent sensors are you mentioned
    Quote Originally Posted by zax View Post
    IMO the commonality here is the P0018 -- Crankshaft position sensor failure.

    If the Crank position is incorrect, the car will fail to inject fuel and spark at the correct moment, and you'll get both a misfire code (which you've posted) and a system rich/lean code (which you've posted). I'd first check the Crank position sensor (under your alternator). It could be loose. I'd also check your camshaft position sensors to be sure it's not correlated from the cam sensor.

    At worst, your timing belt skipped a notch. With 92k miles, is it safe to assume you've not changed your original timing belt?
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  15. #14
    Registered User Venom351R's Avatar
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    I'm taking about the camshaft sensors
    2007 WRX STI- Stock 13.8@102

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    zax
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    Quote Originally Posted by Venom351R View Post
    I'm taking about the camshaft sensors
    To hazard a guess, I'd say right on top of your heads
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