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Old 06-09-2009, 11:20 AM   #1
Subarurus
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Subaru Stars My 02 WRX Problems HELP PLEASE!!!!!!!!

I have an 02 WRX the check engine light came on, so i ran the codes , upstream02 and misfires in cylinders 1,2,3. So i replaced the o2 and all four ignition coils, about 25 mins down the road the check engine light came back on. Codes said upstream02 and misfires in cylinders 1,2,3,4. and my car idles high and low but just enough to notice.

Not sure of whats next. Any one have problems similar to mine?

HELP
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Old 06-09-2009, 11:38 AM   #2
tcpc123
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list of mods please if any?
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Old 06-09-2009, 11:42 AM   #3
amalgrover
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check for intake manifold gasket leaks...my car did almost the same thing when i had blown my intake gasket. you can use a mirror and a flashlight to see in the hard to reach spots.
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Old 06-09-2009, 11:52 AM   #4
Subarurus
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Onlys Mods are SPT intake heat shield and spt catback exhaust , and a HKS SSQV BOV
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Old 06-09-2009, 11:56 AM   #5
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You probably needed that new front oxygen sensor if you saw a P0031 or P0032. What were the other codes, since you said you "ran the codes?"

How did the car drive before and after you replaced all those parts?

I had the P0032 at 115,000miles. Did you have codes for all four coils too, or were you just feeling generous?

If everything seems right, but the O2 CEL stays on, disconnect the negative battery terminal and push the brake pedal to reset the computer. Then do a proper restart.
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Old 06-09-2009, 12:00 PM   #6
Gigabelova
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Please list all the CEL codes numbers you got.
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Old 06-09-2009, 12:08 PM   #7
YourMother'sLover
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Miles on car? When this started? Last work done? etc.
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Old 06-09-2009, 12:57 PM   #8
Subarurus
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the shop told me what the codes meant not really sure of what the actual code was. my car has 102,000 miles the problem started about a year ago with the upstream o2 sensor when i took it back to the shop for the actual repairs he ran the computer again and misfires in cylinders 123 came up along with the upstream o2 replaces the o2 and all 4 coil packs. and check engine light came back on about 25 miles down the road , so i took it back and the computer read upstream o2 and misfires in cylinders 123 and 4
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Old 06-09-2009, 01:03 PM   #9
Gigabelova
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Go to an autozone and have them pull your CEL codes. It is free. Your CEL light is on right?
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Old 06-09-2009, 01:06 PM   #10
Subarurus
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yes my cel is on
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Old 06-09-2009, 01:26 PM   #11
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the O2 sensor has been replaced, so you know it isn't that...and its throwing misfire codes as well, which usually means something is going inside the motor and then the O2 sensor is just picking up on that. The front O2 sensor is just measuring the air/fuel mixture in the exhaust, and then is telling the car to either add or remove fuel based on what it is reading. So, if you are running a little rich or lean, then this could be causing the misfires and varying of your idle rpm. Is your vacuum pressure on your boost gauge sitting pretty steady, or is it kinda wavering as well? It just really sounds to me like you are having the symptoms of a vacuum leak...
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Old 06-09-2009, 01:57 PM   #12
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i just recovered from a long misfire hunt. turns out the valve shims were the issues. i have an 02 with 124k miles. so its possible that you might have the same issue as well. if you check, recheck and change everything out and its still there, then you need to look inside your motor too
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Old 06-09-2009, 02:02 PM   #13
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I say +1 for old/cracked vacuum lines causing a leak.

perform a pressure/boost/vacuum test to find leaks. If none found, I'd say check the valve clearances... 102,000 miles on a turbo motor will lend to tight valves.

-1 for the mechanic jumping the gun to replace the coil packs without properly diagnosing the issue. Don't take the car back to them again. Period!
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Old 06-09-2009, 02:02 PM   #14
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Quote:
Originally Posted by furryfootstool View Post
i just recovered from a long misfire hunt. turns out the valve shims were the issues. i have an 02 with 124k miles. so its possible that you might have the same issue as well. if you check, recheck and change everything out and its still there, then you need to look inside your motor too


You beat me to it.
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Old 06-09-2009, 02:37 PM   #15
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figured you might use me as a reference.
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Old 06-11-2009, 05:40 PM   #16
paintbing
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bump - Don't create multiple threads please.
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