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#1: 11-15-2012, 03:01 PM
[VIDEO] Big problem! Is it bad coils/plugs/sensor/injectors/gas?
 
 DarkiSt
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Title: Junior Member
Location: St. Vincent, Caribbean
Car: 04 Legacy 2.0GT (JDM)
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https://www.youtube.com/watch?v=R_D_PnVUzFw

Anyone know what's causing this problem? I'm waiting on a few parts (an ignition coil, 4 spark plugs and an air filter) but I'm not sure if those will solve it for sure. It wasn't anywhere near this bad before...At first I only noticed the car shaking like it was about to stall when I slowed down to around 5kmph to 10kmph but anything above that speed was fine. I stopped using the car for about 2 weeks while I was waiting on some parts to be shipped here (I'm in the Caribbean). I started the car again today and this is what's happening now.. it got a lot worse! Any ideas on how to begin solving this?

The CEL code is P0031 (Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 1)) but this code popped up ever since I replaced my stock intake with a K&N typhoon.

What do you guys think is the problem here, given the symptoms shown in the video? The last part of the video is showing that the car isnt revving past ~2000rpm even though I'm almost flooring the gas.
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