Hi guys! So last week I was having a misfire in cylinder 5 and I replaced all of the spark plugs and checked the coil packs. Everything seemed to be fine and the code disappeared but then I was having a major idle problem so I tore back into the motor and replaced the PCV and checked the hose. After I finished this I took it out for a drive and everything seemed to be running just fine. A few days later I go to leave for work and suddenly the car is accelerating very fast and very hard all on it's own. I stood on the brakes to make it stop and managed to turn around and get it home. I went to park in my usual place and it wouldn't stop even tho I was again standing on the brakes. I had to slam the car into neutral and then I noticed it was running very hard around 4,000 rpms so I shut it off and will not drive it again until I fix the problem. Can someone please help me with this? I will lose my job if I don't get it fixed soon!!