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Old 01-03-2017, 10:17 PM   #1
wrxflx
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Default 2011 wrx dies when starting sometimes and when coming to a stop

Today my 2011 wrx died when I was coming to a stop and took it out of gear and when I stopped it died. It's only done this once so far but a couple times after when I started it, it died right away. For right now it usually starts and runs fine but I'm worried that this problem could get worse. I recently installed an invidia n1 cat back exhaust, and I forgot I had a drop in k&n air filter. I don't know if running my car with those 2 things and no tune could be the cause of this problem so I put the stock air filter back in but have not drove it since. I need some help haha
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Old 01-03-2017, 10:39 PM   #2
Miggy-Verlander
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When did you last change spark plugs?
Those mods shluldnt need a tune.
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Old 01-03-2017, 10:45 PM   #3
wrxflx
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I haven't ever changed the spark plugs. The engine turns over but then dies right after. I can keep it running a couple seconds if I give it a little gas. I've been looking into this issue on other threads and it seems to me the throttle body needs to be cleaned. But I honestly don't know haha
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Old 01-03-2017, 10:46 PM   #4
fuelMuncher
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How many miles are on the car?
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Old 01-03-2017, 10:49 PM   #5
wrxflx
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84,425
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Old 01-03-2017, 11:03 PM   #6
fuelMuncher
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Spark plugs or a bad coil pack could be the issue. If you were at 100k miles, I'd say valve adjustment is needed.
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Old 01-03-2017, 11:07 PM   #7
wrxflx
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Awesome thanks for the help. I'm new to modding my car and I'm really interested in it. I'm curious as to how the spark plugs would effect this? Same with the coil pack haha.
And do you think I should be okay to put my k&n air filter back in?
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Old 01-03-2017, 11:08 PM   #8
wrxflx
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What do you think about the throttle body idea too?
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Old 01-03-2017, 11:18 PM   #9
Miggy-Verlander
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Its not from the drop in filter, you can be sure of that much.

Are you the original owner? If youve never changed the spark plugs ever, try that first. A coil pack would be related to the spark plugs, but that often throws a CEL code.

This sounds like tell tale spark plug replacement, and thats probably gonna be the cheapest answer too.
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Old 01-03-2017, 11:28 PM   #10
wrxflx
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No im not the original owner. I think the original owner was an old lady and I'm sure she didn't do anything to the car. Except mess up the clutch. I had to have that replaced a little while after I bought it. But I was just looking at all the signs of bad spark plugs and it definitely seems like that. I lost some power to my engine when I was driving it a little while ago at around 4500 rpms. This only happend once, but I think spark plugs is what I need to try first. Hopefully it works. Thank you guys so much for the help
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Old 01-03-2017, 11:38 PM   #11
Miggy-Verlander
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Subaru recommends like every 40,000miles to replace them i think, so its probably due either way.
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Old 01-03-2017, 11:39 PM   #12
wrxflx
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Haha yeah well I've found my Friday night project haha
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Old 01-04-2017, 03:45 PM   #13
D-rock240
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Quote:
Originally Posted by Miggy-Verlander View Post
Subaru recommends like every 40,000miles to replace them i think, so its probably due either way.
Spark plugs at 60k according to the manual for a 2011.
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