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I bought an ‘08 legacy, with a 2.5i naturally aspirated engine with 200,000 miles on it, the guy I bought it from said it was rebuilt around 70,000 miles ago and had pictures of it in the process apparently. A couple weeks after I got it, the CE light came on for a cylinder 2 misfire. Changed the spark plugs, light came back for cylinder 2 again. it already had new NGK wires, so I replaced coil pack next, light came back. And last I changed the injectors, and cylinder 2 misfire code came back. At this point I’ve read that I should do a compression test next, (was going to do it tomorrow). I’ve read it could be a ring or burnt valve or something, but I’m not clear on what the results of the compression test would indicate, nor do I know enough about the inner workings to try and diagnose the problem. With spark plugs, plug wires, coil pack, and injectors all new, but cylinder 2 still misfiring, how would you guys diagnose the problem from here? Also, if it were an O2 sensor or a MAF that was causing the misfire, wouldn’t the ecu throw codes for those? It’s my first Subaru and I love it. I’m prepared for some expensive work from this point on, but don’t want to throw away money needlessly. Much thanks

did that fix it? I have the same code in my 08 legacy, 2.5 non turbo. has new ngk wires, replaced plugs and coil pack. Still have the cylinder 3 misfire code only

Valves out of adjustment? Bad MAF sensor? Bad O2 sensor? Lots of things could cause it.

 

I've yet to see somebody with a bad coil pack on our turbo engines. My car has the original ones at 212K, 15 years old. Plugs, very well could be an issue. Built motors call for spark plugs every 25K, most of them.

 

Wouldn’t the car also throw a code for an MAF or O2 sensor if they were bad? I keep getting a cylinder 3 misfire code ONLY on my 08 2.5l N/A legacy. changed plugs, changed coil pack, has new NGK wires. After the coil pack the CE light went away for a couple weeks but just came back today. not really sure what the next step is