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Old 01-14-2009, 03:19 AM   #1
greenspeed
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Default p0301! compession test?

Well I've thrown the same code for the third time misfire cylinder 1 and figured enough was enough. Pulled the plugs out that only had 7k miles on them they looked perfect. The decided to do a compression check.

I did it cold cause by the time I got everything off it was.

1. 107
2. 105
3. 105
4. 105

They are within 10% of each other. But couldn't for the life of me find anything on the search for cold compression specs. Is there one?

I rotated that coil pack from 1 to 3 and that plug from 1 to 2 so now I can follow the problem if it comes up again but anyone got any other thoughts if it comes back or knowledge on the compression?


Thanks

Greenie
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Old 01-14-2009, 11:00 AM   #2
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Try the injector if that doesn't work.
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Old 01-14-2009, 01:12 PM   #3
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Quote:
Originally Posted by r8r4life View Post
Try the injector if that doesn't work.
That was going to be my next step but I don't want to get injectors just yet cause I'll end up getting 650's and the a huge turbo and blah blah Lol
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Old 01-15-2009, 02:00 PM   #4
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Oh I meant swap around like you did with your coils.
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Old 01-15-2009, 03:29 PM   #5
PSolbergfan
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Check the lash between the cam and the lifter. .008" intake and .010" exhaust. My guess is your exhaust valve clearance is too tight.
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Old 01-15-2009, 04:29 PM   #6
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greenie, with compression specs that tightly grouped i would initially look elsewhere for your problem (ie, coil/injector).
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Old 01-15-2009, 10:53 PM   #7
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I never thought of checking valve clearances.

I have an automotive class in college this semester so I might do a valve clearance check while I spend all semester tweaking my car
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Old 01-15-2009, 11:49 PM   #8
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how cold was the car when you did the check? like the next morning? i assume that subaru knows the car is going to be cooling down a bit when doing the check since they know what the book time is for removing the parts..
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Old 01-16-2009, 12:24 AM   #9
greenspeed
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I pulled the car in the shop around 2 and did the test aroung 5
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