spastic misfiring

[sarah]

Ever since I got this damn car it's always had misfiring problems. I'd replace a part (ex. plugs, wire, coil) then it would go away for 4 months and start back up. The car kills when I go up a hill slowly. And it seems like it only starts to misfire when I have a steady foot on the hwy. Yesturday it was acting up and it would stop misfiring when i let off the gas, but as soon as i give it some fuel there it went again. So..I pulled over let it sit..drove fine all the way home. Obviously, it sounds fuel related, I was wondering if anyone had similar problems Thank You

 

[vietdude]

I have the same problems too. It keeps misfiring as soon as it hits 3k rpm and it sounds like dying when going uphill its been like this for 3 months im still trying to figure it out. The check engine light is on. When i reset the codes, the car runs fine boosting at 16 psi. I'm think its my cat back so I got a Apexi N1 cat and also the rear O2 sensor might be bad so i'm getting that replaced too. Hopefully that solve sthe problem