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2011 Impresa Base Model - 140K miles
Car was running intermittently running rough and ODB scan showed P0301 cylinder #1 misfire. Came and went and now suddenly car won't go and shows misfire on all cylinders. I pulled all the spark plugs and 2 of them were in pretty bad shape. (but not fouled). I replaced them all with new and also tried replacing the coil pack. Car idles fine but still won't go and runs very rough when I try to drive it. I pulled the rear seat and fuel pump cover, pump is definitely running and I can hear fuel flowing although I don't have the means to verify the actual pressure. I'm pretty mechanically minded and can fix a lot of things, but I'm not sure what to try next. Subaru's are new to me. I want to be systematic and not just throw money at it. Weak fuel pump? Clogged injectors? Clogged catalytic? Something else? Hmmmmm. I did reset the (4) cylinder misfire codes, but am not able to drive it enough to get any of them back. Just looking for ideas..... Thanks!
 
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