2015 Subaru WRX Idle Dip and Negative Boost
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This is a discussion on 2015 Subaru WRX Idle Dip and Negative Boost within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hey guys so my first time in here and unfortunately it is to talk about an issue with my 2015 ...

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    2015 Subaru WRX Idle Dip and Negative Boost

    Hey guys so my first time in here and unfortunately it is to talk about an issue with my 2015 WRX. Bought it in July 2014 and currently have 10,400 miles on it. To keep it brief, at around 4k miles I experienced some idle dipping where at a traffic light when I was in neutral, my car would dip down below 500rpms like it almost wanted to stall, then the CEL would come on and it would bounce back to 1krpms. The CEL would stay on for not even 24 hrs before it would go off. So around 4k miles it did a few times and I took it in, and they said they found nothing wrong with it. Now it it happening much more often, as much as weekly. Have an appt this coming Monday to get it in. But this time around I am also experiencing an issue with the boost. It is always in the negative even when accelerating, it'll range between -11psi and about 5psi. You have to really get in the car to get it above 5psi, something is different and seems wrong. Sucks cause its a brand new car. I have seen this issue out there across some forums - just wondering if anyone here has had this experience and what the solution was?

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    Village Idiot McBill's Avatar
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    Did you ever pull the CEL code?
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    I did not. As I said the CEL doesnt stay on for very long, but that is my goal to get it into the dealer when it is on. Almos thave to time it up cause the car will correct itself and the light will go off on the next start up or two.

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    I am hoping the CEL is on come Monday - it is currently off.

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    you can also take it to autozone and they can read the codes if you cant make it to a dealer
    2006 San Remo Red WRX Stage 2

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    Okay thats a good idea, wondering if I take it in Monday and explain the issue to the dealer, they would know what to look for or if they need the car with CEL on to get the code?

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    Any other thoughts? I've read on other forums and on here that the CEL code could be the camshaft position sensors, not sure though cause I havent been able to read the code yet.

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    Village Idiot McBill's Avatar
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    Can't tell without reading the code. We are sort of at a road block until that can be done.
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    Thats what I figured, its just annoying the CEL goes off so quickly. However, my boost gauge is still not reading right. Constantly negative even when accelerating.

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    zax
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    "Negative boost" is merely vacuum. Take the car in. Something is not correct and the car is under warranty.
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