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Old 10-06-2013, 05:15 PM   #1
Yeahbrudy
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Join Date: Jan 2012
Chapter/Region: Tri-State
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2013 WRX
WRB

Default 2013 wrx stage 2+ bank 1 lean (p0171)

Never posted on here before so i apologize in advance for any noob mistakes, but yesterday i drove about 200 miles to pa and once i parked, i noticed my car lumping at idle almost ready to stall. P0171 and PFFFE? were later thrown on the accessport along with a 20:1 afr at idle. Also my vacuum doesn't exceed -11in. and Im not hitting target boost either so im thinking i have a vacuum leak somewhere but honestly don't know what the exact cause can be. I am running a cobb catted down pipe with the cobb sf intake and there OTS map for 93 octane. Thankfully i made an appointment before this weekend for Tuesday morning to get a tune at Precision Tuning.

Update: I brought my car out to Precision tuning and they performed a smoke test even though i found out the BPV hose was blown off the manifold side. There was still a leak somewhere which was later found to be the intercooler coupling was also blown off. They than got my car on the dyno for about 5 pulls before reaching a safe but powerful tune. Overall im very happy with the numbers made and im glad the problem wasn't serious.

2013 wrx
Dynojet: 292whp 330wtq

Cobb catted downpipe
Cobb SF intake
Nameless Axelback
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Last edited by Yeahbrudy; 10-08-2013 at 09:09 PM. Reason: added information
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Old 10-06-2013, 05:47 PM   #2
nmlittlebigman
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WRB

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Sounds like you have a loose or disconnected hose causing a vacuum leak. You may not be hitting boost because of the leak but more likely because your DAM is reduced. Check everything post maf especially IC to TB hose.
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Old 10-07-2013, 02:30 PM   #3
Cobb Tuning
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Agreed, sounds like a fairly big leak has popped up somewhere. You might consider checking the TMIC to throttle body hose as it is quite problematic on the WRX, even on brand-new cars. The other couple areas to check would be to make sure the OTS map is the "Stage2+SF 93" map, not the regular "Stage2 93" map, as well as make sure the intake is still firmly clamped in place, the turbo inlet has not been damaged, etc. Best of luck and keep us updated on what the issue was!

Cheers

Lance
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Old 10-07-2013, 08:48 PM   #4
Yeahbrudy
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Quote:
Originally Posted by nmlittlebigman View Post
Sounds like you have a loose or disconnected hose causing a vacuum leak. You may not be hitting boost because of the leak but more likely because your DAM is reduced. Check everything post maf especially IC to TB hose.
Definitely agree on the leak somewhere just can't pin point it. Last i checked the DAM was stay at 1, but thanks for the input. I will be getting it checked out and tuned tomorrow morning.

Quote:
Originally Posted by Cobb Tuning View Post
Agreed, sounds like a fairly big leak has popped up somewhere. You might consider checking the TMIC to throttle body hose as it is quite problematic on the WRX, even on brand-new cars. The other couple areas to check would be to make sure the OTS map is the "Stage2+SF 93" map, not the regular "Stage2 93" map, as well as make sure the intake is still firmly clamped in place, the turbo inlet has not been damaged, etc. Best of luck and keep us updated on what the issue was!

Cheers

Lance
The leak sounds like its coming somewhere in between the intercooler and the manifold but not exactly sure. Everything near the intake and turbo inlet seemed to be in place and the correct map is flashed. I will further look at it in the morning before i drive about 30min to my tuner. Im nervous to drive it under this condition due to how poorly its running at idle, but i will update more on what happens tomorrow. Thank you for the help.
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Old 10-07-2013, 10:03 PM   #5
Chicago AJ
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'13 Prius C 86mpg!

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Almost definitely your throttle body to intercooler coupler. May look fine from an overhead view but the bottom could be blown out. Definitely keep us updated.
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Old 10-07-2013, 10:21 PM   #6
Yeahbrudy
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Quote:
Originally Posted by Chicago AJ View Post
Almost definitely your throttle body to intercooler coupler. May look fine from an overhead view but the bottom could be blown out. Definitely keep us updated.
Found it!!! After reading on the forums, i got anxious and couldn't wait until the morning to find out the issue. I definitely wasn't looking to drive to the tuner like this either so i went out searching more and found the BPV hose disconnected from the nipple on the intake manifold. Took her out for a drive and everything seems to be running back to normal. Thanks again guys.
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Old 10-07-2013, 10:31 PM   #7
Chicago AJ
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'13 Prius C 86mpg!

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That's awesome, hopefully that was it!
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