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Old 10-12-2006, 12:38 AM   #1
weggy
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Default Knocks at idle.(06 WRX)

Hi everyone,

I bought my 06 wrx two weeks ago.

I've felt the occasional knock at idle. I put 93 gas on her.

Is this normal?

thanks
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Old 10-12-2006, 12:50 AM   #2
Wannascooby
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Could be the uneven headers...unless it sounds like metal popcorn then its not normal!! But a lil rumble here and there is no fuss
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Old 10-12-2006, 09:23 AM   #3
DaKP00r
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Stand next to any other 06, same noise
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Old 10-12-2006, 11:01 AM   #4
78damien
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really? I just got a 06 WRX myself and have noticed the same thing. whats going on with the Subie to make it do that? I was scheduled to take mine into the dealership today and I guess I'll be cancelling that appointment. Thanks
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Old 10-12-2006, 11:06 AM   #5
russd32
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It's a subie and they make funny noises even when they are running fine. Don't sweat it.
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Old 10-12-2006, 12:30 PM   #6
njskatchmo
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the CEL would go off if it was knocking. Car feels mad shakey and should. now get the car moving, wrx's shouldn't be idled.
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Old 10-12-2006, 12:45 PM   #7
Hayes
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Subarus' don't make funny noises, just a different kind of noise. WRXs' shouldn't be idled?? I never heard that WRXs or any car short of a full race car should not be idled.
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Old 10-12-2006, 12:46 PM   #8
Master2192
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How new are you to cars? Every vehicle I have ever driven has a slight shake at idle occasionally. Combustion isn't perfect, the ECU is constantly adjusting to keep the engine at the same rpms.
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Old 10-12-2006, 12:47 PM   #9
Master2192
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Quote:
Originally Posted by Hayes
Subarus' don't make funny noises, just a different kind of noise. WRXs' shouldn't be idled?? I never heard that WRXs or any car short of a full race car should not be idled.
He is just saying they are meant to be driven.
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Old 10-12-2006, 12:47 PM   #10
njskatchmo
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i was joking, not technical, as in wrx's should be driven not idled. just a joke. but car sounds fine.
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Old 10-12-2006, 12:49 PM   #11
Hazmat
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I have my moments when I got my subie too, its all good mang
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Old 10-12-2006, 12:49 PM   #12
step down
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Quote:
Originally Posted by Hayes View Post
Subarus' don't make funny noises, just a different kind of noise. WRXs' shouldn't be idled?? I never heard that WRXs or any car short of a full race car should not be idled.
this is always embarassing
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Old 10-12-2006, 03:57 PM   #13
CynicX
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Quote:
Originally Posted by Master2192 View Post
How new are you to cars? Every vehicle I have ever driven has a slight shake at idle occasionally. Combustion isn't perfect, the ECU is constantly adjusting to keep the engine at the same rpms.
Drive a high end car and you'll change your outlook...I used to work next to a BMW dealer and I would consitantly hear someone trying to start a car thats already running (that grinding sound) because they couldnt tell the motor was running...

.....

You wont have knock at idle even on the worst gas, well within reason. Generally you cant feel knock considering it usually happens at high rpm and high speed. Audible detention sounds to me like a BB in a coffee can, its MUCH easier to hear then feel. And even then you can be experiencing knock without hearing it. Plus the car can see knock before you can and will warn you with a CEL, it will also try to pull timing so you'll have severely reduced power....

What your experiencing is referred too as the "Subaru Shake". Let me guess it will feel smooth and every 5-20 seconds you feel a wobble that shakes the car?

Although I'm not completely sure what the imbalance is, its perfectly normal in our cars. 2.0 and 2.5....

If you read the litature on the Impreza subaru will make it sound like this boxer design is absolutely perfect and balanced and you could never tell its running. When in reality its noisey and not very smooth. Nothing to worry about though, you'll have 150k miles on it and it will still be doing the same thing...
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Old 10-12-2006, 04:02 PM   #14
78damien
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Thanks for the insight CynicX. I feel better knowing that I'm not alone in this and that it doesn't have anything to do with the performance or reliability of the engine. Has Subaru said anything to address this before?
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Old 10-12-2006, 04:28 PM   #15
CynicX
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Quote:
Originally Posted by 78damien View Post
Thanks for the insight CynicX. I feel better knowing that I'm not alone in this and that it doesn't have anything to do with the performance or reliability of the engine. Has Subaru said anything to address this before?
From what I know people that have mentioned something to the dealer were told its normal...

When I got mine I noticed the shake and noise and although I read on here time and time again that its normal I still had to goto the dealer and check. Except when I went I didnt show them my car I wanted to check another new car they had on the lot. And sure enough it sounded EXACTLY the same....

Go try it out, the salesperson will probably be glad to put your mind to rest...

Also always run 93 octane.....
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Old 10-12-2006, 04:56 PM   #16
neutronium
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I only feel it when the A/C is on.
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Old 10-12-2006, 05:22 PM   #17
Master2192
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Quote:
Originally Posted by CynicX
Drive a high end car and you'll change your outlook...I used to work next to a BMW dealer and I would consitantly hear someone trying to start a car thats already running (that grinding sound) because they couldnt tell the motor was running..
No it won't, because not hearing the motor is different than feeling slight variations in combustion. The subaru's most likely are easier to feel because of different motor mounts and the block is so small there isn't much metal to absorb the vibration.

I will admit that vibration in the Subys is more noticable. I can feel the individual igntions through my shifter if I am paying attention. I kind of like it that way though.
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Old 10-12-2006, 08:37 PM   #18
Hayes
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Whooo. My 2000 Forester IS SMOOTH. I often times must look at the tachometer to see if its running. I've found it is the smoothest after a hightway run of several miles.
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Old 10-12-2006, 10:31 PM   #19
WolfInSheepsCLothing
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Quote:
Originally Posted by njskatchmo View Post
the CEL would go off if it was knocking. Car feels mad shakey and should. now get the car moving, wrx's shouldn't be idled.
i guess it depends how much its knocking...

i never saw a CEL when my engine would knock when it was stock, but it was knocking because i was using MOBIL gas! when i switched gas, to CHEVRON, 76, and SHELL, it never happened again...
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Old 10-12-2006, 10:35 PM   #20
hondaeater69
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man my wrx is quiet compared to my 98 2.5GT Legacy...
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Old 10-12-2006, 11:05 PM   #21
HemiKLR
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Quote:
Originally Posted by Wannascooby View Post
Could be the uneven headers...unless it sounds like metal popcorn then its not normal!! But a lil rumble here and there is no fuss
hahaha metal popcorn... I like that
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Old 10-12-2006, 11:07 PM   #22
shemoves
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most likely normal...go to yur dealership and have them start one up so u can compare.
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