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Old 04-04-2012, 05:16 PM   #12
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Join Date: Oct 2010
Location: Minnesnowta
Posts: 3,672
My Ride: 4cyl of fury
Originally Posted by gferrer View Post
PO174 - System running too lean bank 2
I bet that's a cracked and/or torn intake boot. Check it out. I'd be surprised if it was the DISA valve, if anything it would be the DISA seal not the valve itself. Do the rest of the maintenance anyway. I'd advise against the use of the K&N because it has a tendency to oil up the MAF. The OEM filter works great.

It's likely that more air is getting into the intake than the car knows about. Where that air is getting in is up to you to find. Flip side is not enough fuel is getting in, rare cases this happens. Check the fuel pump for proper operation and replace the fuel filter.

Good luck and let us know what it was!
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