I was driving down the road other night and the truck threw code p0300 I change the Ing coil plugs and wires was change last month pulled the plugs they still look good it has a rough idle in park then stick it in drive it either cuts off or runs really bad any ideas what could be causing this

 

Captain Hook posted a link how to test and diagnose the fuel system ......as far as secondary ignition u need to use only ACDELCO ignition parts.........plugs,cap,rotor , wires however u can get away with auto lite professional wires , however that is the only thing u can skimp on.....if u use aftermarket cap,rotor,plugs u will surely have issues!!!! Goodluck

 

I will give it a shot see what I can up with

 

The fuel filter was clogged change that and still doing the same anymore ideas could cause this problem