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Old 09-13-2009, 10:20 PM   #1
SkunkBug02
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Default #2 Misfire CEL Code P0302

Hey,

I am BRAND NEW to this forum as well as Subaru. I bought a really nice 2002 WRX just yesterday and it has been amazing... until just now. I was taking a friend home and did a 2nd gear pull (not the first one) and a few minutes after that my throttle was pretty unresponsive and idling at 500rpm.

Went to a local store and checked the codes, said misfire in #2 and the code was P0302.

I am currently a true noob at Subaru (give me time ) but i have some friends who know them very well. So if anybody could please give me some help i would really appreciate it.
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Old 09-13-2009, 10:24 PM   #2
05Scooby
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do a search online. Its a generic code so it should be findable lol
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Old 09-13-2009, 10:29 PM   #3
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Ok cool, thank you. Im hoping to have her up and running (strong) for a meet next Sunday.
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Old 09-13-2009, 10:40 PM   #4
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I would try to find out when the last time the plugs where changed and change them accordingly. Welcome to the subaru family enjoy.
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Old 09-13-2009, 10:43 PM   #5
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Quote:
Originally Posted by twonb1 View Post
I would try to find out when the last time the plugs where changed and change them accordingly. Welcome to the subaru family enjoy.
Thank you

Im looking up some stuff on it now and I guess its supposedly some-what common among 2.0 imprezas from 96-06?

Dealing with carbon tracking, bad coilpacks, and injector plugs just falling off... lol.
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Old 09-13-2009, 10:53 PM   #6
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Oh and a lot of white smoke is pumping out of my exhaust and Im getting scents of gas... could that be because of the engine only banging on 3 cylinders?
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Old 09-13-2009, 11:58 PM   #7
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Quote:
Originally Posted by SkunkBug02 View Post
Oh and a lot of white smoke is pumping out of my exhaust and Im getting scents of gas... could that be because of the engine only banging on 3 cylinders?
Yes, if the cylinder isn't combusting then it's pushing fuel into your hot exhaust piping and being ignited there. This can ruin your catalytic converters if you're still in stock form.

Normally white smoke is coolant. Give it a whiff and see if it smells 'sweet' or if it just smells like raw gas.

Edit: Most likely your coilpack is shot, the plug is bad, or the electrical connector came off the coilpack. I say that since you're actually smelling the uncombusted fuel.
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Old 09-14-2009, 12:21 AM   #8
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Quote:
Originally Posted by Haelan View Post
Yes, if the cylinder isn't combusting then it's pushing fuel into your hot exhaust piping and being ignited there. This can ruin your catalytic converters if you're still in stock form.

Normally white smoke is coolant. Give it a whiff and see if it smells 'sweet' or if it just smells like raw gas.

Edit: Most likely your coilpack is shot, the plug is bad, or the electrical connector came off the coilpack. I say that since you're actually smelling the uncombusted fuel.
I dont have cats so no worries there, but (forgive me, Im tired lol) how and why would coolant be getting burnt in my exhaust pipe?

My friends coming over tomorrow to help me out with this, I'm making a list of your guys' suggestions so hopefully this will go smoothly.
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Old 09-14-2009, 12:30 AM   #9
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Originally Posted by SkunkBug02 View Post
I dont have cats so no worries there, but (forgive me, Im tired lol) how and why would coolant be getting burnt in my exhaust pipe?
A blown head gasket.

If you have the ability to do a compression check you might want go ahead with that as well.
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Old 09-14-2009, 12:34 AM   #10
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A blown head gasket.

If you have the ability to do a compression check you might want go ahead with that as well.
I know I need to replace my valve cover gasket... but I just bought the car and had Subaru specialists do a pre-buyers inspection on the car so I dont think it would be my head gasket. I hope...

Does white smoke ALWAYS mean coolant... because I dont think I've been smelling coolant, just gas.
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Old 09-14-2009, 12:38 AM   #11
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Quote:
Originally Posted by SkunkBug02 View Post
I know I need to replace my valve cover gasket... but I just bought the car and had Subaru specialists do a pre-buyers inspection on the car so I dont think it would be my head gasket. I hope...

Does white smoke ALWAYS mean coolant... because I dont think I've been smelling coolant, just gas.
Not always...no, but normally raw fuel burning in the exhaust would come out as black smoke. You can also check the color of your coolant and also make sure no bubbles are coming up in your overflow tank when it's idling.
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Old 09-14-2009, 12:47 AM   #12
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Quote:
Originally Posted by Haelan View Post
Not always...no, but normally raw fuel burning in the exhaust would come out as black smoke. You can also check the color of your coolant and also make sure no bubbles are coming up in your overflow tank when it's idling.

Alright, cool. Thanks for all the help, I'll be trying this in the morning.
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Old 09-14-2009, 10:34 AM   #13
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if you can get your hands on a scan tool you can find out if a cylinder has spark or fuel then you cna narrow down your problem
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Old 09-14-2009, 01:08 PM   #14
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Originally Posted by wf0311 View Post
if you can get your hands on a scan tool you can find out if a cylinder has spark or fuel then you cna narrow down your problem
Thats how I found out I have a misfire in cylinder 2 and the error code P0302
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Old 09-14-2009, 09:42 PM   #15
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Good luck man. I too am brand new to the subaru world. I just purchased a 2002 wrx for 500 bucks cause it wont start. I was told by a friend this is the best place for info, hope it works out.
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Old 09-14-2009, 09:51 PM   #16
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So I got my car running in about 15 minutes today... lol. Turns out it was a boot from the coil pack that just wasn't fully snapped on. Im guessing the last person to change the spark plugs (the dealer I think) just didn't reinstall the boot properly.

Thanks for the help guys!
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Old 09-14-2009, 09:54 PM   #17
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Quote:
Originally Posted by bz7202 View Post
Good luck man. I too am brand new to the subaru world. I just purchased a 2002 wrx for 500 bucks cause it wont start. I was told by a friend this is the best place for info, hope it works out.
Will the car crank at all? My friends car wouldn't crank and it was just a wiring problem with the neutral safety switch on the clutch. My 240SX (FOR SALE BTW ) wouldn't crank over and it was because the relay to the starter went bad. So you might wanna look into that stuff before buying a new starter, etc.

Good luck! and NASIOC is the BEST place for info or anything for that matter haha
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Old 09-15-2009, 02:10 AM   #18
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So, now that my engine is running good and all, the white smoke has gone away. So does that mean it wasnt coolant? Could it have just been caused by my car's rough idle do to only 3 cylinders igniting?
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Old 09-15-2009, 10:45 AM   #19
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Quote:
Originally Posted by SkunkBug02 View Post
So, now that my engine is running good and all, the white smoke has gone away. So does that mean it wasnt coolant? Could it have just been caused by my car's rough idle do to only 3 cylinders igniting?
Yeah you're fine...it was more than likely unburnt fuel in your exhaust.
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Old 09-15-2009, 01:47 PM   #20
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Yeah you're fine...it was more than likely unburnt fuel in your exhaust.
Very good new...
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