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Old 01-04-2014, 06:18 PM   #1
Caniacfan17
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Dizzy 2001 SC2 p0301 code

Just bought this vehicle and it has 163,000 miles. When I got it, it had 5 codes stored, all leading to a tune up. I replaced both coil packs, all wires and plugs, and pvc valve. Reset the light and drove about 150 miles and the ses light came back. 19 DOHC, Now the only code it has thrown is the p0301. Any ideas on where to start next?

Last edited by Caniacfan17; 01-04-2014 at 06:20 PM. Reason: mis spelling
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Old 01-04-2014, 06:21 PM   #2
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Default Re: 2001 SC2 p0301 code

I would suggest doing a Compression test on Cylinder 1 and report back your results, Being yours is a DOHC that rules out a possible intake gasket failure.
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CHECK YOUR OIL!
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Old 01-04-2014, 06:24 PM   #3
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Default Re: 2001 SC2 p0301 code

Thanks! What would be acceptable compression range?
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Old 01-04-2014, 06:33 PM   #4
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Default Re: 2001 SC2 p0301 code

Anything below 180 PSI usually indicates a problem.
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2015 Subaru Forester Limited "Prinny"
2000 SW2 Still Running Strong- 160K Traded In
2002 SL1 Still has Its Training Wheels on at 88K Traded In


CHECK YOUR OIL!
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Old 02-02-2014, 04:52 PM   #5
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Default Re: 2001 SC2 p0301 code

First issue was the wrong plugs were installed. Just replaced with NGK Platinum. Tested compression. Cylinder 1 was at 205 and all others were in the 190-195 range. Reset the light and will see what happens. If it pops again, where would you go next?
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Old 02-02-2014, 07:52 PM   #6
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Default Re: 2001 SC2 p0301 code

Swap the #1 fuel injector with another one, see if the misfire follows the injector or stays on #1.
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Old 02-02-2014, 11:36 PM   #7
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Default Re: 2001 SC2 p0301 code

+1^^^ Swap the injector to another cylinder.
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2015 Subaru Forester Limited "Prinny"
2000 SW2 Still Running Strong- 160K Traded In
2002 SL1 Still has Its Training Wheels on at 88K Traded In


CHECK YOUR OIL!
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Old 02-03-2014, 07:05 PM   #8
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Dizzy Re: 2001 SC2 p0301 code

Well of course I have the old P0301 again and this time we have a P0410 to go with it. Haven't had time to try swapping the injector yet but will do. Any idea on the P0410? Is Iit EGR?
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Old 02-03-2014, 07:09 PM   #9
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Default Re: 2001 SC2 p0301 code

Quote:
Originally Posted by Caniacfan17 View Post
we have a P0410 to go with it. Any idea on the P0410? Is Iit EGR?
No its the air pump system, More then likely the exhaust manifold or air tube going to the exhaust manifold is clogged up with carbon and needs to be cleaned out. Heres a video on troubleshooting the air pump system.

http://www.youtube.com/watch?v=dIrmkxj6wJE
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2015 Subaru Forester Limited "Prinny"
2000 SW2 Still Running Strong- 160K Traded In
2002 SL1 Still has Its Training Wheels on at 88K Traded In


CHECK YOUR OIL!
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Old 02-10-2014, 10:55 AM   #10
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Default Re: 2001 SC2 p0301 code

So far so good. Airpump checked out fine as well as the diverter valve. Found the thin rigid tube running across the valve cover to be disconnected on the back side so no vacuum was present at the switch. Connected it up and reset the codes. It's been 150 miles and 8 full hot/ cold cycles without a hitch
Appears as of now like it's fixed! Thanks for all the help!
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