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

Knock sensor, fuel pressure regulator, injectors,

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.

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