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Old 07-14-2013, 02:53 PM   #1
nonamekevin
Scooby Newbie
 
Member#: 202546
Join Date: Feb 2009
Chapter/Region: RMIC
Location: Boulder, CO
Vehicle:
2009 WRX
Dark Grey Mettalic

Unhappy 09 WRX. P0301 after tune-up. Confused.

Last night I took my 2009 WRX in for my 60K maintenance (plugs, air filter, oil/filter,rear diff fluid, tranny fluid, coolant). Here is the timeline of events...

1) Finished the tune-up, and my mechanic backed it into the wash stall to give it a bath. Engine bay and exterior.

2)After drying the car, he told me to take it down the block to knock some water out of the cracks. I went WOT 1st and 2nd gear, and half way through 3rd gear. No issues.

3)Return to shop to get the rest of the water off the ride. Leave and hit the freeway. About 15min later I downshift to 4th and give it gas around 3500rpm. Boggs and stutters. Try again 5min later in 4th again, same thing.

4)Get off the freeway, and try in 1st gear. Same stuttering through 1st and 2nd now. Seemed to happen more on WOT.

5)Call my mechanic when I get home, and he said there was probably water in the intake somewhere, and to let it sit overnight.

6)Start it up this morning, and right off the bat it misfires at idle. Shut her down, and restart. Idles better, but any touch of the throttle and it misses at 1k-2k. Did not drive, checked through AP and got the p0301 and pffff code.


Its like it got progressively worse sitting overnight. I checked the lines to the boost gauge thinking it might have been boost leak or maybe the line got dislodged from the wash. Looks good. The next thing I'm thinking is plug wasn't gapped correctly on the first cylinder. But then I should have noticed this on the trip on the 2nd event on the timeline right?

My mechanic should be coming out to my car later today to take a look. Anyone have any ideas about wth is going on?

Thanks
-Kevin
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Old 07-14-2013, 04:51 PM   #2
nonamekevin
Scooby Newbie
 
Member#: 202546
Join Date: Feb 2009
Chapter/Region: RMIC
Location: Boulder, CO
Vehicle:
2009 WRX
Dark Grey Mettalic

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That cylinder 1 misfire was read with Cobb ap. CEL didnt come on.
Right now I'm stg 2.
-invidia catless dp
-gs aos
-kartbot sts
-kartboy f/r shift bushings
-gs heatshield
-RCE/GTWORX suspension
-defi boost gauge.

-Kevin
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Old 07-14-2013, 05:00 PM   #3
Dago25trizzle
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Member#: 358346
Join Date: Jun 2013
Chapter/Region: NWIC
Location: Tacoma, WA
Vehicle:
2003 Impreza wrx
Silver

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I would remove coil # 1 check for water, pull the plug(if no water) just to make sure the plug crush washer was crushed
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Old 07-14-2013, 05:54 PM   #4
Blackfin
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Member#: 361325
Join Date: Jul 2013
Chapter/Region: E. Canada
Location: Ontario
Vehicle:
2010 STi
Dark Gray Metallic

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Thinking water is in #1's plug well too.
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Old 07-14-2013, 07:18 PM   #5
nonamekevin
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Member#: 202546
Join Date: Feb 2009
Chapter/Region: RMIC
Location: Boulder, CO
Vehicle:
2009 WRX
Dark Grey Mettalic

Default

Checked coil #1. Pigtail plug was halfway connected.

Snapped back in, no more misfire. Took it on the road, and it drove like dog ****. Was hitting maybe 6psi on my gauge. Pulled over, resett ecu, re-loaded stg 2 map. Now I'm hitting target boost in all gears so far.

Did the ecu learn how it was driving when I had the misfire, and thats why it was running crappy? After the reset everything seems to be good.

I was told to do another reset, let it idle for 5min, drive around town 5-10min normal, hit the freeway and mix up boost/no boost. Thoughts?

Thanks all
-Kevin
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Old 07-14-2013, 08:37 PM   #6
BeefCurtains64
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Member#: 251257
Join Date: Jul 2010
Chapter/Region: International
Location: DFW
Vehicle:
12 WRX

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Search for "p0301 fix" and try that.
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Old 07-14-2013, 09:25 PM   #7
nonamekevin
Scooby Newbie
 
Member#: 202546
Join Date: Feb 2009
Chapter/Region: RMIC
Location: Boulder, CO
Vehicle:
2009 WRX
Dark Grey Mettalic

Default

Quote:
Originally Posted by BeefCurtains64 View Post
Search for "p0301 fix" and try that.
I'm not getting the code anymore, because I fixed the loose connection.

Now I'm just wondering if I should do a reset like I was told to do, or leave it as is if I'm hitting target boost and everything.

Thanks
-Kevin
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