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I have a 2001 Impreza coupe with 45K on it. My idle has gotten rough with a noticible misfire, dead spots in the rpm range, and just running bad alltogether.

I've replaced the fuel filter, plugs, wires and yesterday I dropped $100 on a new coil. Still runs like crap. I'm at my wits end, throwing money at this problem.....my CEL codes were Misfire cyl 1,2,3,4 and a fuel trim error which I'm assuming is from the O2 sensor picking up the unburned fuel from the misfires.

A timing light placed on the plug wires has been giving me mixed results.....I get a very fast spark on one cylinder and others are misfiring. I was SUUURE it was the friggin coil, but it wasn't.....HELP!!!!!!

Thanks.

 

--Scott

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Scott, how long's it been doing this? Did it begin gradually or rather suddenly?

 

Any chance that you've gotten a tank of really lousy, scummy fuel? I've heard that because of the hurricane thing, there's some rank fuel being distributed.

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It started at the beginning of Summer, prolly June or July. I actually don't remember if it was sudden, or gradual.

 

I just ordered a knock sensor (I don't even know where it is on my engine!) so hopefully that takes care of it.

 

 

 

--Scott

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