i have been up and down this site in search of some form of direction in my recent adventure.
I have just bought a used 02 wrx, still cant believe i have one, it is bone stock. The day i bought it i got my first CEL shot the codes 302 and 304. Though i had thought it idled a bit rough when i test drove it, but it was responsive on the throttle, i failed to question it. i was not afraid to get my hands dirty if i had to. I replaced both plugs and swapped out the coils for good measure. To my pleasure i went a whole week and a half with no problems. the idle still seemed rough when cold but other than that was all sunshine and daisies.
Then on my way to work about 5 min after start up push in the clutch at a light and she dies. hit the key and shes running again. next light, same thing. after that was highway and did not do it again all the way to work. after work fired it up and smelled gas raw gas through the vents (Air was on), shut her down and popped the hood, could not smell it in the engine compartment though, nor could i smell it under the car. fired her back up to see if i could smell it when she was running. instead she sputtered and choked and ran REAL rough. and gave me a solid CEL. then smoothed out for the most part. i shot the codes again and got P0301, P0302, P0304, P0113.
i also checked the MAF and made sure that was clean. checked for any major vacuum leaks as well. Any help or Direction would be greatly appreciated.