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09-15-2015, 12:58 PM | #26 |
Scooby Newbie
Member#: 98303
Join Date: Oct 2005
Chapter/Region:
MAIC
Location: Arlington, VA
Vehicle:2013 WRX SWP |
Ok I'll give it a go.
This may be bad form to link to another board, but the OP has another thread going at http://www.wrxforums.com/forums/10-s...range-fix.html that has pics from other members and some deeper info. Thanks for getting this going 99pgpgt.
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10-04-2015, 12:56 PM | #27 |
Scooby Newbie
Member#: 338096
Join Date: Nov 2012
Vehicle:2013 WRX DGM |
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05-17-2016, 02:24 PM | #28 |
Scooby Newbie
Member#: 311522
Join Date: Feb 2012
Chapter/Region:
South East
Location: The Jungle
Vehicle:2012 WRX Icy Silver Metallic |
Bringing a thread back from dead. I'm hoping this is my fix. I have been getting random misfires for a couple of weeks now. Last week it was 1,3,and 4 cleared the codes later that week it was just cylinder 3 but the roughness on all cylinder counts were high. This week its Cylinder 1 and 4 and my CEL popped up literally seconds after I started my car that morning. I sure hope this is it.
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05-18-2016, 12:12 AM | #29 |
Scooby Guru
Member#: 98210
Join Date: Oct 2005
Chapter/Region:
Tri-State
Location: Upstate NY
Vehicle:2016 Forester XT CWP 2002 WRX SRP 2016 Sienna |
Hey, I took those pics. Glad they are coming in handy.
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08-25-2016, 01:33 PM | #30 |
Scooby Newbie
Member#: 227642
Join Date: Oct 2009
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2014 WRX w/ P0300 and intermittent rough idle.
Dealer has harness on order. I have my fingers crossed. Cheers, |
09-02-2016, 12:14 PM | #31 |
Scooby Newbie
Member#: 241233
Join Date: Mar 2010
Chapter/Region:
E. Canada
Vehicle:2011 WRX Hatch WRB |
Wanted to share my results to help folks out. It was going to be a $1000 job to replace the wiring harness on my 2011 WRX. I did the soldering fix and the car has been running great so far (1 week, which is a huge improvement). Will keep monitoring.
For a bit more detail on the root of the problem, you can read about the revised wiring harness that is the official fix. http://subaru.oemdtc.com/308/design-...12-2014-subaru |
03-29-2017, 08:33 PM | #32 | |
Scooby Newbie
Member#: 465225
Join Date: Mar 2017
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Did you ever find the fix for this isssue?
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04-05-2017, 01:14 AM | #33 |
Scooby Specialist
Member#: 36980
Join Date: May 2003
Chapter/Region:
NESIC
Location: Middletown, CT
Vehicle:2002 Impreza WRX MBP |
Bringing this thread back to the top as I've just encountered this problem in my 13. It has 72k miles and i just got the code a couple of weeks ago. The car doesn't run/idle choppy and it doesn't appear to be misfiring. After bringing it to Suburban Subaru, they determined that the wiring harness is the issue, and when they wiggled the harness, the engine began to misfire. SOA is refusing to cover this and say that it isn't a widespread issue yet. Any thoughts on this? Has anyone else had this covered by SOA? i Feel SOA should be liable for a faulty wiring harness, whether it takes 5k miles for it to happen or 70k miles, a wiring harness isn't a wear and tear item. I even have extended warranty and they denied coverage. FYI, they want $1000 to fix this problem, $380 for the harness and the rest labor.
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04-05-2017, 06:17 AM | #34 | |
Scooby Specialist
Member#: 23313
Join Date: Aug 2002
Location: Collegeville,Pa
Vehicle:99' 2.5Rs black |
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04-05-2017, 07:22 AM | #35 |
Scooby Guru
Member#: 98210
Join Date: Oct 2005
Chapter/Region:
Tri-State
Location: Upstate NY
Vehicle:2016 Forester XT CWP 2002 WRX SRP 2016 Sienna |
It takes like 20 minutes to unwrap the wiring harness and put a drop of solder on the problematic***8203; connection...
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04-21-2017, 05:30 PM | #36 |
Scooby Newbie
Member#: 335243
Join Date: Oct 2012
Chapter/Region:
Tri-State
Location: Nyack, NY
Vehicle:13 WRX SWP |
Going to be doing this to mine tomorrow. Someone actually told me about in on instagram of all places.
I've been throwing phantom cylinder misfire codes for a week now. Each time is a different cylinder or the p0300 random code. No signs/feelings of a misfire. 100% throttle response. Just randomly turning the CEL light on when it feels like it. Lets see if I am one of the lucky(unlucky) ones. |
05-01-2017, 07:29 AM | #37 |
Scooby Newbie
Member#: 335243
Join Date: Oct 2012
Chapter/Region:
Tri-State
Location: Nyack, NY
Vehicle:13 WRX SWP |
1 week, 300 miles after this fix and I havent thrown a CEL since.
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05-31-2017, 11:32 AM | #38 |
Scooby Guru
Member#: 36838
Join Date: May 2003
Chapter/Region:
MAIC
Location: Reston VA
Vehicle:2001 B50 RSTi Sedan 2011 DGM WRX hatch |
So my 2011 has been misfiring at idle lately and I wandered upon this and the WRXForums thread.
I wiggled/flexed the harness while the shuddering was going on and it definitely has an affect. Guess I'll be un-looming it and cleaning all the pins and soldering that crimp... |
06-12-2017, 08:03 AM | #39 |
Scooby Newbie
Member#: 388567
Join Date: Apr 2014
Chapter/Region:
Tri-State
Location: Brick, NJ
Vehicle:2014 WRX Hatch ISM |
My car is back at subaru for a p0300. Was there 3 weeks ago for the same cel. They replaced the wire harness, cel came back in a week ago. Got a call from them saying everything so far checks out, but will keep the car a few more days to check more out.
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11-16-2017, 07:28 PM | #40 |
Scooby Newbie
Member#: 477844
Join Date: Nov 2017
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My 2013 WRX got the P0300 first time about a year ago (November 2016) at 80,000 miles. It cleared itself before I did anything, but I ran some Techron and Heat through the tank and cleaned the MAF.
It popped up again at the 90,000 service in May this year. The dealer kept it and said they found an intake manifold leak and replaced the gaskets. Popped up a third time October 2017 a little over 100,000 miles. I cleaned the MAF again, cleared it, and it came back. It's at the dealer now because I wanted them to fix it right (at their expense) if they didn't do it right the first time. They called and said manifold gaskets are fine, not leaks, and now they need to check valve clearance (sounds like valve lash) for 3 hours labor, if bad pull engine (!) and adjust valves. I haven't gotten an answer yet as to any troubleshooting of the wire harness ground issue. I have asked the service writer, and was told I need to talk to the service manager. But the service writer said they called Subaru Field Tech Service and they said to check the valves. I should have done the wire harness ground solder fix myself first, just to see if it worked. I'd like them to at least rule that out before doing exploratory surgery. I really don't see how the valve lash gets smaller over time, as stuff wears, lash increases. And I don't see how it would affect all cylinders randomly with misfires. |
01-25-2018, 01:17 PM | #41 |
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Member#: 338467
Join Date: Nov 2012
Chapter/Region:
South East
Location: Delray Beach
Vehicle:2013 Impreza WRX White Satin Pearl |
I've been having this issue for about 30K now. Where it would only show up every 10K, now its showing up every 2K.
Error P0300 / PFFFE. Every single time I have to reset the ECU to clear the CEL. Yesterday I actually drove with the CEL on in LIMP Mode and oddly it still achieved boost and ran very normal. I had the AP and didn't notice any adverse events during LIMP mode. This morning I reset the ECU, but it's annoying b/c then it loses all of its learned parameters. Disclosure, the short block was replaced at 60K (due to dealer negligence) which shortly there after this started occurring. I don't know if something happened with the wiring harness during this process. |
02-09-2018, 02:31 PM | #42 |
Scooby Newbie
Member#: 430330
Join Date: Sep 2015
Chapter/Region:
South East
Location: cleveland tn
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So I'm looking at doing this solder fix to my wiring harness as well. My question is, is it just the one joint in the harness or are there multiple joints that need to be soldered? Thanks
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04-19-2018, 11:16 PM | #43 |
Scooby Newbie
Member#: 484900
Join Date: Apr 2018
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Hey all,
This issue has been happening to me. Getting the P0300 code although the car drives fine. Dealer hasn't been able to indicate what the issue is. They just replaced the wiring harness, and 2 days later the code is back on. At this point they are recommending an engine tear down, "as it could have a tight valve clearance or a burnt out valve." This issue started with my car at ~50k miles, and has been showing up intermittently for the past 15k miles. Anyone have any other thoughts or experiences with this, beyond what a wiring harness replacement would fix? |
04-19-2018, 11:27 PM | #44 | |
Scooby Guru
Member#: 90539
Join Date: Jul 2005
Chapter/Region:
South East
Location: SWLA
Vehicle:My BOV goes COVFEFE! |
Seems like a very simple fix that can eliminate a lot of hassle. What I'm wondering though is if anyone's crimp at that location was actually loose, as in you could wiggle or slide the crimp. It appears to be several shields that share one ecu ground, for engine sensors. Just be sure to solder it well, hot enough so the solder flows into the joint and bonds well.
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04-23-2018, 04:46 PM | #45 |
Scooby Newbie
Member#: 484900
Join Date: Apr 2018
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Wouldn't there be a pretty obvious difference in the way the car is driving if this was really happening (ie not a faulty sensor, but actual misfires)? Something like a big difference in power, car sputtering or obviously running rough...?
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05-08-2018, 11:44 PM | #46 |
Scooby Newbie
Member#: 441566
Join Date: Feb 2016
Location: Pittsburgh PA
Vehicle:2013 Impreza WRX 5dr Charcoal black |
Lost.
About 8 or 9 months ago I had a very similar misfire problem, I had the codes for cyl 1 misfire and coil a. I replaced the coil, and changed all sparkplugs. No change. Ran across this page, and tried the fix, worked at first, but now after these 8 or so months, it has appeared again. I tried adding more solder, as well as changing the spark plugs again thinking maybe I gapped them wrong (or didn't put NGK's in), but to no avail. I've now been driving with the misfire for about 2k miles, and the strange thing is how absolutely inconsistent it is. I went 2 weeks out of the blue without a hitch. I went a week where I didn't go more than 2 hours without it missing. My only thoughts are either there's possibly another ground point that's maybe come loose as well, or perhaps it's because it only has one fuel filter in the fuel tank, which I would imagine is nothing more than just a sock to catch the big stuff. I may at some point pull the tank, depending on my findings. If anybody knows anything, please, I'm just a broke 21 year old trying to save some money so I can keep driving the car I love and not have to give it up for good.
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05-10-2018, 07:16 AM | #47 | |
Scooby Specialist
Member#: 344329
Join Date: Jan 2013
Location: Summit County
Vehicle:2008 Wrx, 6mt |
Quote:
It's pretty easy to change, search on here and you'll find a write up with part #'s. |
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05-22-2018, 03:19 PM | #48 |
Scooby Newbie
Member#: 388567
Join Date: Apr 2014
Chapter/Region:
Tri-State
Location: Brick, NJ
Vehicle:2014 WRX Hatch ISM |
Next month will be a year with this issue. Went off for a long time came back on. replaced the only thing i replaced to begin with. Spark plugs. When the cell came back on before i replaced the plugs again, it was misfiring 2,3,4. and that pfffe. So far after replacing plugsw no issues. I have been monitoring the roughness cycle of each cylinder to see if any keep on running. Hasnt come back up, losing hope here. lol
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06-26-2018, 10:42 AM | #49 |
Scooby Newbie
Member#: 370019
Join Date: Oct 2013
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Some background info:
I have had my 13 wrx since new. I did notice some hard start issues in winter and by doing the soldering fix (as per photos above) seemed to help. This was a few years ago. The rough idle dips slowly crept in as described by many people. It was getting worse this spring to an almost predictable level.... like when the car was heat soaked after my drive home. Some times the car would just sound like it was misfiring. Never triggered a CEL but I checked anyway and pulled a P0451. THE FIX: I found a thread on clubwrx that cought my attention where a poster said his mechanic "He removed and replaced a butt connector, which is part of the engine wiring harness. The connector joins a Black/Yellow wire to 4 wires." So this crimp is in the same bundle off harness as the fix above. There is a single black/yellow wire that joints four black/yellow wires. Its warped up good. Once I unwrapped it I found a bunch of black tar paste under the tape. You will need to clean it off. Q-tips soaked in brake cleaner worked for me. Remove and re-crimp with cleaned wires. Add solder with a nice hot soldering iron (40W minimum). You want to heat this up so solder flows in. Protect wires below from solder of course..... Tape everything back up. The car now idles at a steady 800 rpm. No more dips or misfires since the fix and it has been three weeks with many hot days in between. Knock on wood. Feels like its driving better too but that could be in my head. Anyway give this a try guys if your still looking for a solution. |
08-03-2018, 01:11 PM | #50 |
Scooby Newbie
Member#: 489322
Join Date: Aug 2018
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Hey guys!
I have a 2014 WRX hatch and have had multiple misfires in different cylinders after changing my spark plugs. Took it to the dealer and they tried to tell me that I needed a new short block and that it was ring land failure. RO states that the mis went from 2 to 4, then none. Also wanted to charge me $400 to do a cylinder leak down and compression test. They reset the ECU and said it ran fine. I took my car back home, flashed my Stage 1 +, then had a miss in cylinder 1. I did both tests with no abnormal numbers. Reset my ECU with my AP and data logged every drive. Code came up while sitting in the parking lot. This time miss was in cyl 3. Reset it again and am not getting any codes but it is running like crap. Talked to some people at COBB Tuning and they pointed me to the TSB for a ground relocation. Common on 2012-2014 WRX. Here are the part numbers I found for this TSB. TSB is 07-96-15. I am not covered under warranty so it is going to be $400 for the harness and 6 hours labor. HARNESS-ENGINE 24020AF071: 2012MY WRX & Forester Turbo 24020AF531: 2013-14MY WRX & Forester Turbo Hope this helps anyone else that is having issues with random misfires. |
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