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Old 08-18-2016, 05:08 PM   #1
chiefmyron
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Member#: 447625
Join Date: May 2016
Chapter/Region: Tri-State
Location: 07306
Vehicle:
2004 WRX

Default Just a quick question on P0301 & P0303

So recently my CEL came on after running smooth all summer. I went ahead and scanned it to find P0301 and P0303. The car is not misfiring or idling wrong so it kind of surprised me. I did change the plugs but not that caps almost 1500 miles ago. Should i erase the codes and wait for them to come back? Because right now the car is fine even with the CEL.
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Old 08-18-2016, 05:24 PM   #2
anjuna
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Member#: 401977
Join Date: Sep 2014
Chapter/Region: TXIC
Location: Houston
Vehicle:
IDFK Wat
bish whet

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just document that these codes came on, that the vehicle is functioning normally, and then clear the codes.

If they come back, you know you'll have an issue.
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Old 08-18-2016, 09:51 PM   #3
hondaeater69
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if the CEL didn't flash, it wasn't a *serious misfire. when a serious misfire event occurs, the CEL will flash when it happens... it's possible it was a false misfire... lightweight flywheels and crank pulleys can cause these. what kind of plugs and gap?
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Old 08-18-2016, 10:30 PM   #4
chiefmyron
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Quote:
Originally Posted by hondaeater69 View Post
what kind of plugs and gap?
i installed standard NGK platinum spark plugs.
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Old 08-18-2016, 10:32 PM   #5
chiefmyron
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2004 WRX

Default

A little update. I drove the car around for about 30 - 40 minutes and it was running good. Turbo was spooling, idle was good, and just overall driving was fine. I'm going to just see if it pops up again and bring it into my mechanic to do some tests.
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Old 09-10-2016, 12:27 AM   #6
wrx1392
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blue

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try tightening the the blow off valve where it bolts to the intercooler ,be careful not to strip the threads alum. is soft .
my son had a miss fire code he freaked out sold the car dirt cheap ...guy that bought it had a smoke test done ...loose Blow off valve ...tighten two bolt code went away ....son lost his nice subi. dang kids
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