This is a manual. I have replaces the cat converter, o2 up and down, fuel filter, plugs and wires, oil changed regularly. Detection code reads po300 random misfire. It starts up fine for the first 5 seconds then while in neutral is idles very rough and knocks then dies. When I press on the gas it gets none and the rpm's stay the same. Once I slowly let off the gas the rpm's go up. It will not stay running until it is warm and when driving it will not go over 10-25 mph. The plugs were changed before the cat converter. Could this have caused them to go bad? I had replaced them months before getting the converter changed out due to an after market radio (K wire not hooked up) issue and the dealership. Weird thing is it was running and ran a little sluggish until I cleared the codes the first time and has been barely running since. Even after the cat and o2 replacement.