HELP!!! NEED FEEDBACK PLS

[bomexs14]

I'll start off with my knock sensor bank 1 went out so i decided to change out both knock sensor at the same time. now after i changed that i got a code for random misfire, again i decide to change out all the plugs and ignition coils all brand new OEM parts. I started up the car a few minutes later i got another for P0300 for random misfire. someone please explain this to me? how is this possible?

Thanks
Chris

[Ozzie]

Try disconnecting your battery for 10-15 mins, so the ECU has a chance to reset, and check all your engine earth wires.
Make sure they are secure, and not broken or corroded.

If that doesn't work, a P0300 code is usually thrown when one of the following occurs:

Faulty oxygen sensor(s)
Faulty fuel injector(s)
Faulty spark plugs or wire
Faulty coil (pack)
Burned exhaust valve
Faulty catalytic converter(s)
Stuck/blocked EGR valve / passages
Faulty camshaft position sensor
Defective computer

I know you have changed the plugs, coils, etc...
Check/replace the leads and the O2 sensors, and make sure you don't have a vacuum leak first.

You didn't mention if the car is running rough, stumbling, or any other symptoms.
Is it doing anything like this, or just throwing the code?

[bomexs14]

Ok here's more updates, after I replaced the followings mentioned the car ran or I guess idled smooth, once it threw the code idle was stumbling and rough and it was also blowing white smoke out of the muffler, and I forgot to mention that I had to apply slight pressure on the gas pedal for the engine to start up.