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Running rich at idle!!!

Old 02-25-2012, 03:21 PM
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Exclamation Running rich at idle!!!

Hello everybody,

So I fired up the car this morning and after a 5 minute warm up I start to see small clouds of blue smoke I just recently bought my 03 WRX, and fortunately no problems thus far besides this morning. I'm wondering if any tech-friendly people could help asses my problem before it gets worse...

Here is a list of my mods that could be directly related to the car running rich

Greddy TBE
Sti injectors
Sti tmic
Turbo xs bov (vta)

Originally, I had a greddy recirc bov but after a while I noticed a leak in the adjustment screw, so a buddy of mine sold me the turbo xs for 20 bucks to get me by.

Could I be idling rich simply from running a vta bov? Or is it something more? I am also speculating that the injectors are sucking in too much fuel to be compensated by my OEM intake. I am planning on getting a tune, but my trusted guy is booked until late march, so I'm SOL until then I guess... Let me know what you guys think!


Thanks guys!
Jared
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Old 02-25-2012, 04:10 PM
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So you're not actually checking AFRs?
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Old 02-25-2012, 09:21 PM
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The only thing I'm checking is my narrowband gauge thus, which reads lean. I'm guessing fuel is soaking my o2 sensor, which is causing it to read lean. I know I'm running extremely rich from that wonderful smell
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Old 02-25-2012, 10:21 PM
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Change the O2 sensor. If you really are running rich the O2 sensor should be reading rich.

And put on a stock bypass valve and get rid of the BOV. BOVs are crap on MAF based systems.

Also. Are you tuned for the STI injectors?
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Old 02-25-2012, 10:31 PM
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Thanks for the input! I am tuned for the injectors, but I'm guessing the change from a recirc to a vta threw it off somehow?
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Old 03-01-2012, 11:20 AM
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Maybe your BOV is leaking at idle?

-- Ed
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Old 03-02-2012, 02:33 AM
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That could be a possibility, how would i go about testing that besides checking hose connections?
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Old 04-05-2012, 10:04 AM
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A buddy of mine had a similar issue with the blue smoke. It turned out he had a misfire in one of his cylinders. Might want to check that just to rule it out
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