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08-26-2010, 02:16 AM | #1 |
Scooby Newbie
Member#: 136854
Join Date: Jan 2007
Chapter/Region:
SCIC
Location: Southern California
Vehicle:2006 WRX Wagon Urban Grey Metallic |
Stock 06 WRX--Engine stuttering and loss of power.. Please help!!
I’ve been having some trouble with my 2006 Subaru Impreza WRX for some time now, but only recently has it gotten worse.. Here’s what’s going on:
At about 2500 to 3000 RPM, the engine will begin to stutter and lose power. By stutter, I mean the car will jerk as I try to accelerate. Acceleration during this time is minimal to absent unless I change to a lower gear. In a lower gear, acceleration is slow until I reach 3500 to 4000 RPM, then the car will accelerate as normal. After driving about 20 miles or so, the problem usually corrects itself but will reoccur either same day or again in a few days. I have no engine modifications at all. I perform oil changes regularly. I’ve recently changed spark plugs and the fuel filter with OEM parts, as well as cleaned the PCV valve and MAF. When the problem first presented itself, I was still under warranty, but the service techs weren’t able to figure out what was wrong. Any idea what this could be?? Thanks!!
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08-26-2010, 04:08 AM | #2 |
Scooby Specialist
Member#: 51588
Join Date: Dec 2003
Chapter/Region:
SCIC
Location: Burbank, CA
Vehicle:2006 WRX TR 1997 Supra Turbo |
It's good that you took the vehicle to the dealer while it was still under warranty - you're likely going to end up going back to the dealer to replicate the problem and use that as leverage to get them to cover it.
Have you found that it jerks more or less at certain times of the day, temperatures or levels of humidity? |
08-26-2010, 09:53 AM | #3 |
Scooby Newbie
Member#: 254265
Join Date: Aug 2010
Chapter/Region:
MAIC
Location: Reading, PA
Vehicle:06 WRX Black |
Dumb question but did you try resetting the ECU yet?
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08-26-2010, 12:34 PM | #4 | |
Scooby Newbie
Member#: 136854
Join Date: Jan 2007
Chapter/Region:
SCIC
Location: Southern California
Vehicle:2006 WRX Wagon Urban Grey Metallic |
Quote:
Yeah, I have.. And when I do, the problem will disappear for a while, but eventually come back. I appreciate your help guys.. any ideas? |
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08-26-2010, 02:24 PM | #5 |
Scooby Newbie
Member#: 242821
Join Date: Mar 2010
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Try cleaning your mass airflow sensor. My 07 will do this once and a while and i clean it with electrical cleaner and reset my ecu... voila problem solved! idk if this is your issue but it sounds like it could be and wouldnt hurt to try.
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08-26-2010, 03:53 PM | #6 |
Scooby Newbie
Member#: 136854
Join Date: Jan 2007
Chapter/Region:
SCIC
Location: Southern California
Vehicle:2006 WRX Wagon Urban Grey Metallic |
I cleaned my MAF not too long ago.. Maybe I didn't clean it well enough. Do you use the CRC MAF Cleaner or the submerging-in-alcohol method?
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08-27-2010, 12:49 PM | #7 |
Scooby Newbie
Member#: 242821
Join Date: Mar 2010
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i used maf cleaner. but the last time i did it i didnt have any maf cleaner and i used brake parts cleaner (yes i know not the best for it) but it worked awesome. i sprayed the BPC on there and sprayed it off with a air hose and everything was fine. i wouldnt let the BPC sit on there for a long time though.
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08-27-2010, 12:53 PM | #8 |
Scooby Newbie
Member#: 242821
Join Date: Mar 2010
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CRC MAF cleaner is the way to go though! if you do use the BPC do it with caution !
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07-17-2011, 08:29 PM | #9 |
Scooby Newbie
Member#: 288707
Join Date: Jul 2011
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suBerSam,
did cleaning the mass flow air sensor work? im having the exact same problem cheers |
07-17-2011, 09:41 PM | #10 |
Scooby Newbie
Member#: 175724
Join Date: Mar 2008
Location: covington
Vehicle:06 sti met grey |
I have a similar problem between 2k and 3k rpms,power loss under light acceleration but at wide open throttle cant feel it. Subaru could not find the problem even though they could feel the car loosing power.I have 06 Sti Cobb stage 2.
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07-18-2011, 04:35 AM | #11 |
Scooby Newbie
Member#: 280539
Join Date: Apr 2011
Chapter/Region:
MWSOC
Location: St. Louis Missouri
Vehicle:2007 Impreza WRX WRB |
I have a 2007 wrx no mods it does the same thing and the dealership said i have a lightened fly wheel on the car they said if i swap a factory flywheel back on it that will fix the problem. Also the turbo makes a quick grind noise at 4k rpm in only 2nd and 3rd gear. the dealer ship is really starting to aggravate me. any ideas?
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07-18-2011, 03:58 PM | #12 |
Scooby Newbie
Member#: 228077
Join Date: Oct 2009
Location: Maryland
Vehicle:2006 WRX Limited Black |
I had a similar issue and I thought it was my boost control selenoid. come to find out when I removed my MAF to clean it the gasket got all tangled up due to it being old and stretched. I took the MAF off and sat the gasket in nice and snug, then tightened the screws a little at a time. Then reset the ECU. Even before "learning" was done it felt a whole lot better (Southern Maryland talk) Try it out. Its one of the easier things to do.
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07-18-2011, 04:16 PM | #13 |
Scooby Newbie
Member#: 132394
Join Date: Nov 2006
Location: NORFOLK, VIRGINIA
Vehicle:1.21 gigawatts? Lighting bolt power bitch |
everybody has this problem, moded or not. if you find an answer, youll be the first
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08-12-2011, 11:57 PM | #14 |
*** Banned ***
Member#: 291207
Join Date: Aug 2011
Chapter/Region:
RMIC
Location: South Jordan
Vehicle:2006 Aspen White WRX Stage 2 |
I am having this same exact problem! I have a stock 06' WRX too and your description is exactly what I'm experiencing. Around 2500-3k RPM it sputters REALLY bad!
Have you found any solution yet? I would really appreciate any feedback. |
08-13-2011, 12:17 AM | #15 |
Scooby Specialist
Member#: 277630
Join Date: Mar 2011
Chapter/Region:
MAIC
Location: Rockville MD
Vehicle:2007 WRX TR WRB |
my 2007 does the same thing. only mods are a spt intake and greddy catback. today i removed my battery for the first time since owning it to replace my headlight bulb and then the motor didnt want to start afterwards. got it started and it idled better than before. but it still stumbles.
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08-13-2011, 12:20 AM | #16 |
*** Banned ***
Member#: 291207
Join Date: Aug 2011
Chapter/Region:
RMIC
Location: South Jordan
Vehicle:2006 Aspen White WRX Stage 2 |
I have been looking into cleaning the MAF sensor and am hoping that will do the trick. Has anybody tried this with success? Any feedback would be appreciated.
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08-19-2011, 09:07 AM | #17 |
Scooby Newbie
Member#: 161314
Join Date: Oct 2007
Chapter/Region:
NESIC
Vehicle:2007 WRX Black |
I just started having the same problem... Completely stock 07 WRX. I'll try cleaning the MAF sensor, thanks for the tip.
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08-19-2011, 07:43 PM | #18 |
*** Banned ***
Member#: 291207
Join Date: Aug 2011
Chapter/Region:
RMIC
Location: South Jordan
Vehicle:2006 Aspen White WRX Stage 2 |
Well I just got it out of the body shop and haven't even cleaned the MAF sensor. It seemed to fix itself. Sweet!
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08-22-2011, 12:21 AM | #19 |
Scooby Guru
Member#: 117767
Join Date: Jun 2006
Chapter/Region:
RMIC
Location: Denver, CO
Vehicle:2014 Audi S4 DP Stage 2 (~420whp) |
I make it a habbit to reset the ECU by unplugging the battery for 30 minutes and cleaning the MAF with MAF cleaner every single time I change my oil. I've never experienced the issue you guys are describing. Just my $0.02.
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08-22-2011, 02:33 AM | #20 | |
Scooby Newbie
Member#: 277845
Join Date: Mar 2011
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Quote:
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08-22-2011, 02:36 AM | #21 | |
Scooby Newbie
Member#: 277845
Join Date: Mar 2011
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Quote:
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09-07-2011, 01:51 PM | #22 |
Scooby Newbie
Member#: 271539
Join Date: Jan 2011
Chapter/Region:
Tri-State
Location: Toms River, NJ
Vehicle:2008 sti DGM |
Did anybody ever find out the cause of this? I have a 2010 wrx with TBE and K&N intake just flashed to stage 2 tried different maps that i got through some forums and cobb but its getting worse and its every time I drive now. Basically unless I floor it around 5 psi and/or 2500 - 3000 rpm range it feels like the car is pushing but wont go anywhere or rev higher and stutters/jerks unless I floor it and it goes away after a minute or so but does it everytime. Any info please let me know.
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02-28-2013, 11:40 AM | #23 |
Scooby Newbie
Member#: 348578
Join Date: Feb 2013
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i know its an old post but i just had this problem this morning with no acceleration in low rpms and only 5psi i cleaned the MAF and reset the ecu and it works great
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05-20-2014, 10:19 AM | #24 |
Scooby Newbie
Member#: 29194
Join Date: Nov 2002
Chapter/Region:
MAIC
Location: midlothian, va
Vehicle:2006 WRX wagon (STG II) & '08 Tribeca |
same as problem as OP
bump for any kind of resolution!?
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05-20-2014, 10:42 AM | #25 |
Scooby Newbie
Member#: 29194
Join Date: Nov 2002
Chapter/Region:
MAIC
Location: midlothian, va
Vehicle:2006 WRX wagon (STG II) & '08 Tribeca |
I am having the exact same issues as the OP. My AP is also telling me my AFR are around 13.5-14 at WOT!! 14.7 at idle and she idles smoothly and no problems starting.
Gas mileage has not changed at all. 2006 WRX: Cobb TBE Cobb standard Stage 2 tune K&N typhoon intake Here is what I have done so far: Thought it could be the neutral possition switch on the tranny - replaced it - no change. Replaced the fuel filter - no change Reset ECU several times now - no change Did a cursory inspection for cracked intake/vac hoses - none are obvious. Replaced plugs about 10,000 miles ago. I realize the KN filter my affect my AFR numbers, but I didnt think theyd be that high. Will the ECU try to correct for the high AFR and cause this stuttering acceleration at low RPM only?? Again, she pulls great above 4k... Any input would be greatly appreciated! |
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