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Old 04-30-2013, 02:45 AM   #1
spongerrich
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Member#: 214736
Join Date: Jun 2009
Chapter/Region: SCIC
Location: Oceanside, CA
Vehicle:
2005 WRX wagon WRB
Cobb Stage 2 OTS

Default Help!!! Lost power and making loud puffing sounds!

Normal driving shifting into 2nd. Car sounds like it backfires and instantly looses power. Check engine light flashing intermittently.

Captured a quick video. LOUD "puffing" air sounds by the turbo/intake area.

Towed the car home and taking it apart tomorrow to see if I can figure it put.

Take a listen and let me know if you have any ideas. Thanks.


05 wrx. Stock turbo. Sti tmic. Cobb catted DP, Cobb catback exhaust. Perrin catless up pipe. Cobb intake. Cobb OTS stage 2 91 oct map
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Last edited by spongerrich; 05-02-2013 at 11:41 AM.
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Old 04-30-2013, 02:47 AM   #2
spongerrich
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Member#: 214736
Join Date: Jun 2009
Chapter/Region: SCIC
Location: Oceanside, CA
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2005 WRX wagon WRB
Cobb Stage 2 OTS

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I posted the vid to my local Facebook Subie group and some people thought it could be a cracked up pipe.
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Old 04-30-2013, 03:08 AM   #3
kiwi_fozze
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definately sounds like a massive pre turbo exhaust leak.
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Old 05-01-2013, 01:56 AM   #4
spongerrich
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Join Date: Jun 2009
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Location: Oceanside, CA
Vehicle:
2005 WRX wagon WRB
Cobb Stage 2 OTS

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Turns out it was a spark plug that came loose in the front passenger spot. Hence the air popping sound.

Bad news is the threads are stripped in the head.

To properly fix the head does that mean the motor needs to be pulled?

Not gonna tackle it myself. Gonna have a pro Subie shop do it. Maybe a good time for some upgrades since the motor may need to be pulled.
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Old 05-01-2013, 12:00 PM   #5
danny522
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Location: monroe, mi
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white

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This just happened to my wife's mountaineer, napa sells a kit for $40 that comes with a reamer and sleeve. You use a socket wrench for the reamer. You spray oil on it as you cut to keep the shavings from entering the cylinder. Then put the sleeve on the plug and reinstall. Pretty easy job but then again might not be so easy on the h4.
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Old 05-01-2013, 12:18 PM   #6
art@grimmspeed
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Aspen White

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Defiantly take it to a knowledgeable shop to be fixed. Had you recently changed plugs or had work done to the car?
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Old 05-01-2013, 01:17 PM   #7
spongerrich
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Vehicle:
2005 WRX wagon WRB
Cobb Stage 2 OTS

Default

I had changed the plugs a little while ago myself, and I do remember that particular plug was very loose when I changed it. That was the first time taking out the plugs since I got the car from the previous owner in 2009. I'm pretty sure the damage was done before I got it, it was just a matter of time.

^danny. Thanks, but the clearance needed on the H4 would make it very hard, if not impossible. Pretty sure they are gonna have to pull the motor to do it right.
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