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Old 06-17-2019, 09:33 PM   #1
Scooby Newbie
Member#: 491301
Join Date: Sep 2018
Default 2.5i non turbo 0304 check engine

2009 impreza non turbo 125k, recent head gasket installed at dealer. About a month or so later I started to notice a slight gas smell in the cabin after filling up. thought maybe I stepped in gas at the station, ran through the full tank and still smelled it. Seen a little gas at the top of pump. Replaced the seal and it was still leaking.. drove to work mon, tues, then wed it was running rough for about the first 1/2 mile then was fine the next 20miles. parked it for a few days then pulled into garage to replace the fuel pump with an aftermarket and it was running rough when i pulled it in... I replaced the fuel pump. Started it up and it was still rough when pulling out of driveway. Drives fine at low RPM and lower speeds until you get on the gas, then it sputters and shakes until i let off the gas or baby the petal. Check engine light, traction control, and cruise blinking. Checked the code and it said P0304 and P0304pd (pending display). Plugs and timing were replaced around 100k. any thoughts?
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Last edited by S_tillers; 06-18-2019 at 07:18 AM.
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