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Old 09-28-2007, 10:28 AM   #1
SkiWrex
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Member#: 142559
Join Date: Mar 2007
Chapter/Region: RMIC
Location: Utah
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02 PSM
Wagon VF39'd

Default CEL is KILLING Me...HELP!

I have re-occuring misfire codes that are plaguing me, any suggestions, help, advice would be highly appreciated. I've owned my '03 WRX since March of '07. Bought it in San Diego and drove it home to Salt Lake, after a few weeks of owning it, got my first CEL, it was a misfire on 3 of the cylinders, so I replaced all four plugs with NGK Iridium's. It was fine for two months, no problems. In June I moved to Phoenix and after a few weeks of living here it came on again, but on two of the cylinders, I replaced those plugs again and it was fine for a week or two, and came on again, different cylinder, it has been doing this since then, different cylinders each time (I think I'm on my 9th CEL routine). I've had the lower O2 sensor replaced, I had FAT take a look at it and clean my coil packs, I've cleaned the MAF sensor and air filter. It's always the same thing, I do something that I think will fix it and the CEL stays off for a week or so and them comes on with misfire on diff. cylinder. I use Chevron Premium gas, my only Mods are Snorkus removal with K&N panel filter, and a 3" Cat Back exhaust, (stock D.P. and U.P.) It drives fine, occasionally I'll notice a little erratic idle, but it's so subtle and it lasts only a second or two, any comments or suggestion would be valued.
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Old 09-28-2007, 12:07 PM   #2
dozer54321
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you might wanna contact treefrogaz here on the site, im sure he could help you
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Old 09-28-2007, 12:10 PM   #3
shemoves
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I'd just replace it all at once just to avoid the guessing game. You'll spend more money trying to find it in the long run. So, new plugs, wires, coil pack, and maybe even the battery. The car prolly has a bit of miles on it, so it'd be good to do any way just as a part of maintenance, and you can get upgraded stuff.

Do to the lack of mods, get OEM spark plugs. If after doing all that, then it could be something with the fuel system like a clog/partial malfunction that causes random fuel flow issues.

When replacing things (individually or in groups), try to do so in a manner that allows you to 'check something off the list' without adding a different one on. That may actually be a good starting point...just writing a list on a piece of paper of everything it could possibly be.

Then number items in groups. The groups should be confined to things that affect eachother. For example, the injectors and the fuel filter would be in the same group, but the spark plugs and the fuel pump would be in different groups.
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Old 09-28-2007, 12:17 PM   #4
Caliente Auto
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Replace the coil packs and get a fuel injection flush would be my suggestion.
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Old 09-28-2007, 12:23 PM   #5
racingfish
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or take it to a dealership and have it diag'd


ohh its def not the spark plug wires <))><
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Old 09-28-2007, 12:27 PM   #6
r0bman
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Quote:
Originally Posted by racingfish View Post
ohh its def not the spark plug wires <))><
Nah, and I'm pretty sure it's not the distributor either
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Old 09-28-2007, 12:57 PM   #7
LegacyGt05
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It could be a bad fuel injector, I know, I have had 4 go bad on my car ... so I'd check that too. Switch them out and see if you get a CEL on a different cylinder.
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Old 09-28-2007, 01:59 PM   #8
SkiWrex
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thanks for the advice, I'm gonna run some Lucas Injector cleaner/lub. through and see if that helps, if not, I might have to just replace the injectors I guess
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Old 09-28-2007, 02:01 PM   #9
racingfish
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Quote:
Originally Posted by LegacyGt05 View Post
It could be a bad fuel injector, I know, I have had 4 go bad on my car ... so I'd check that too. Switch them out and see if you get a CEL on a different cylinder.
he doesnt have a lgt....

and its common for leggys f.i. to go out. or so ive been told. thats why they switched to the diff feed system.
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Old 09-28-2007, 02:16 PM   #10
Todd@Goodspeed
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or a fuel filter... in tank filter
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