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06-06-2013, 12:20 PM | #1 |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
Just Changed Plugs - Now hesitation/sound WOT
I just replaced my spark plugs with NGK LFR6AIX-11 . When I cranked the car after putting them in everything seemed fine. Yesterday while on the interstate I tried to pass someone in Sport # mode at about 60mph. Stepped on the gas and got this wired kind of sound and no power. (sounds kind of like if you try to play a didgeridoo and end up just blowing air through). I looked around and found some info, but wanted to ask anyway. One forum I read that any plug with the "-11" is wrong. The only mod so far is a catback (Accessport should arrive in the mail today ). I also read that going one step colder is not recommended without mods. Would this be the reason? (FYI, these are the plugs that Advance Auto pulled in thier system).
Normal driving is fine, idle seems fine, pulls in 1st and 2nd seem fine too. Any thoughts on what might be happening? Where to look? Loading stage 1 now? Thanks...be gentle...still learning the car' whoops, forgot to add that when the car hesitates/sputter and makes the sound, the check engine starts flahsing and the throttle mode goes back to Sport mode. After a few seconds everything returns to normal.
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Last edited by LoveMyNewSoob; 06-12-2013 at 10:39 AM. |
06-06-2013, 01:36 PM | #2 |
Scooby Specialist
Member#: 276443
Join Date: Mar 2011
Chapter/Region:
TXIC
Location: Abilene, TX
Vehicle:2005 2.1 stroker WRX OBP |
If thats not the stock plug then i would go back to it. At stg 1 there is zero need for an aftermarket or step colder plug if that is one?
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06-06-2013, 01:49 PM | #3 |
Scooby Specialist
Member#: 324808
Join Date: Jul 2012
Chapter/Region:
E. Canada
Location: Toronto, canada
Vehicle:2006 IWL Stg2 OBP |
so you dont have a aftermarket downpipe right? if so, then you;re looking at stage 1 flash at the most from your accessport. give it some time for the motor to re-adjust itself with new spark plugs. dont go beating on right away. jeez!
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06-06-2013, 01:56 PM | #4 |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
hahaha...that might be my problem.
I don't have the AP yet, but yes, it will just be a stage 1. |
06-06-2013, 01:57 PM | #5 |
Scooby Specialist
Member#: 324808
Join Date: Jul 2012
Chapter/Region:
E. Canada
Location: Toronto, canada
Vehicle:2006 IWL Stg2 OBP |
what did u torque your plugs at? whats the gapping?
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06-06-2013, 02:06 PM | #6 |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
hand tightend, then half a turn torque. gapped .030 per NGK.
I understand this may be an issue after reading some posts. This was my usual process on my old car which I had no issues with. This new car is still a learning process for me. |
06-07-2013, 01:09 PM | #7 |
Sammo Hung
Moderator Member#: 10613
Join Date: Sep 2001
Chapter/Region:
South East
Location: N Fla / S Ga
Vehicle:2002 USDM WRX WRB |
-11 is for NA non turbo car.
gap should be smaller..0.027-0.029 |
06-09-2013, 04:33 PM | #8 |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
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06-09-2013, 05:29 PM | #9 |
Scooby Specialist
Member#: 276443
Join Date: Mar 2011
Chapter/Region:
TXIC
Location: Abilene, TX
Vehicle:2005 2.1 stroker WRX OBP |
Heres a lesson for ya. THEY ARE JUST CASHIERS!! nothing else.
Learn your car. Learn your parts |
06-10-2013, 11:20 AM | #10 |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
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06-10-2013, 07:46 PM | #11 |
Scooby Specialist
Member#: 290592
Join Date: Aug 2011
Chapter/Region:
South East
Location: Charlotte, NC
Vehicle:15 Outback, 15 WRX 6MT CWP |
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06-12-2013, 10:38 AM | #12 | |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
Quote:
Thanks, I had perused that one before. So, are you thinking it is a gapping issue? Wrong spark plug? The sticky says that the plugs I bought would suffice. An earlier poster mentioned the "-11" is for the NA car, is that true? I have searched and not confirmed that. This weekend I plan to pull the plugs and check the gaps. Would that be enough to be causing the problems I am having? Again, new to the "performance car" thing so trying to learn as I go. Thank you in advance for your patience and help. |
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06-12-2013, 02:05 PM | #13 |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
quick update:
I did some more researching around the Spark Plugs sticky and found a link to another post. That post stated that the "-11" on the NGK spark plugs means the gap is .044" (this is also confirmed on the NGK website, though it also says factory gap for part 6619 is .030). I will not be able to confirm what the gap is on my plugs for sure until this weekend when I pull them out again. Is it unsafe to do a couple hundred miles on these until I can put new ones in? Thanks again. |
06-12-2013, 06:50 PM | #14 | ||
Scooby Specialist
Member#: 290592
Join Date: Aug 2011
Chapter/Region:
South East
Location: Charlotte, NC
Vehicle:15 Outback, 15 WRX 6MT CWP |
OK. here's the story on LFR6AIX-11:
Quote:
Quote:
I think the bottom line is, if you're buying LFR6AIX-11, check the gap before installing. Last edited by mechatricity; 06-12-2013 at 07:12 PM. |
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06-12-2013, 07:44 PM | #15 | |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
Quote:
I just picked up the right plugs (SILFR6A) which is gapped at .030. While I was there I had them pull a LFR6AIX-11 and checked the gap at the store... .044. I am probably going to write NGK too. Advanced auto said I could bring the others back for a refund though I put about 600 miles on them over the weekend as I went on vacation. Is that gonna cause problems? I stayed out of boost for the most part... |
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06-12-2013, 10:29 PM | #16 |
Scooby Specialist
Member#: 279525
Join Date: Apr 2011
Chapter/Region:
Tri-State
Location: QUEENS NY
Vehicle:06 Fxt |
Yes as mentioned before the "-11" plugs have larger gaps hence they They are for the N/A subarus since they are not force inducted vehicles
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06-12-2013, 10:31 PM | #17 |
Scooby Specialist
Member#: 279525
Join Date: Apr 2011
Chapter/Region:
Tri-State
Location: QUEENS NY
Vehicle:06 Fxt |
Yes the "-11" plugs come pre gapped with a larger gap, hence they are for N/A use.
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06-13-2013, 09:02 AM | #18 | |||||
Scooby Specialist
Member#: 290592
Join Date: Aug 2011
Chapter/Region:
South East
Location: Charlotte, NC
Vehicle:15 Outback, 15 WRX 6MT CWP |
Quote:
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06-13-2013, 09:26 AM | #19 | |
Scooby Specialist
Member#: 290592
Join Date: Aug 2011
Chapter/Region:
South East
Location: Charlotte, NC
Vehicle:15 Outback, 15 WRX 6MT CWP |
I just got another response from NGK re: SILFR6A:
Quote:
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06-13-2013, 10:29 AM | #20 | |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
Quote:
well, i am not very impressed with all of this. I got a different response from Jason... Hello, I am sorry that you had this issue with this plug in the Subaru. Unfortunately this plug does not come out pre-gapped as it is not the OEM plug. The Laser series will come out pre-gapped as it is the OEM plug that Subaru installed in the engine as EOM equipment. [FONT='Arial','sans-serif'][/font] [FONT='Arial','sans-serif']Best Regards,[/font] [FONT='Arial','sans-serif'][/font] [FONT='Arial','sans-serif']Jason Norwood[/font] [FONT='Arial','sans-serif']NGK Spark Plugs ( USA) Inc.[/font] [FONT='Arial','sans-serif']Technical Services Administrator – Aftermarket Division[/font] [FONT='Arial','sans-serif']46929 Magellan Drive[/font] [FONT='Arial','sans-serif']Wixom, MI 48393[/font] [FONT='Arial','sans-serif']Office: (248)-926-7107[/font] [FONT='Arial','sans-serif']Fax: (248)-926-6938[/font] [FONT='Arial','sans-serif']Email[/font]: [email protected] ASE Certified Ngksparkplugs.com |
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06-13-2013, 10:30 AM | #21 |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
So he is saying that the SILFR6A is not the right plug either!?!? Maybe that is for your car/year? That numbers is actually what is listed in my manual, so that is what I am going with. Should have them in this weekend. |
06-13-2013, 10:37 AM | #22 | |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
Quote:
It is also interesting that Jason asks you to "please gap a .044 plug down to .030" when their website clearly states they don't recommend an adjustment larger than .008 either way: http://www.ngksparkplugs.com/tech_su...p.asp?mode=nml If my calculator is correct that would be almost twice the recommended adjustment. |
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06-13-2013, 11:05 AM | #23 |
Scooby Specialist
Member#: 290592
Join Date: Aug 2011
Chapter/Region:
South East
Location: Charlotte, NC
Vehicle:15 Outback, 15 WRX 6MT CWP |
I would go with what your manual says. I can't figure out what the difference is between ILFR6A and B.
I forgot about the .008 thing. I should have called him out on it. |
06-13-2013, 12:30 PM | #24 | |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
Quote:
Yeah, I did. He is sending me two sets of new plugs (the right ones). Thanks again for all your help and info. Lesson learned for checking plug gaps |
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06-14-2013, 05:47 PM | #25 |
Scooby Newbie
Member#: 323213
Join Date: Jun 2012
Location: Atlanta
Vehicle:2009 WRX Sti hatch Spark Silver |
Update:
Just changed the plugs out to the correct ones and my baby is back!!! Woohoo! Autozone gave me my money back for the wrong plugs too. And...I just went stage 1! Fun times!! |
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