Hey guys!



I'm a new owner of a V1 WRX (K Reg import). I have owned the car about two weeks, everything seems pretty good. I have a Subaru Specialist just down the road from me but he's away on holiday for 4 weeks so i can't get him to have a look for me.

My problem is when i start my car from cold (the morning for example) i will let it run for 5 mins to warm up; (like I've been told to do) then I'm on my way. After 1/4 mile pretty much at the same point on the road each time on my journey to work it will start to missfire. I don't go taring off and never boost in the first couple of miles. When the missfire happens the engine won't rev i can shift down a gear but the revs still wont rise up and the car just wants to stop. If i pull over and stick it in neutral and let it idle for a bit then gently rev it it will suddenly burst back into life and then will be totally fine for the rest of the drive/day until it has cooled down again. It will do the same after work then on the way home. About a 1/4 of a mile in it will repeat the missfire etc.

it never does it any other time only when its cold and within 1/4 mile from the origin.

I have run the self diagnostics and it is coming up with faults on the Knock Sensor and the O2 sensor.

Any ideas what i should try to fix this issue?

Any help would be gratefully received.

If there is any info I that would help let me know and i can fill you in....



Cheers guys