The engine has a miss at idle and I have checked the glow plugs and injectors it will start just fine but has this miss and shows numbers 1&3 cylinders are missing but not why

SOURCE: misses and lots of white

first question is it smoke or steam ? if if ligers in the air behind you as you drive with little dissipation or if its steam it will dissapear more quickly . either way , head gasket is first . once saw a car do that excessive engine oil put in by owner . giant flumes of white smoke . if you ever want a true smoke scren to get away then adding about 2 to 4 quarts of oil extra . man it is something to see

SOURCE: 2000 VW Jetta VR6 My

You may have a bad coil pack - try moving two of them around and see if the misfire follows the coil pack or stays at the same cylinder. If it follows the coil pack, get a new one. If it stays in the same cylinder, inspect your spark plug wires and make sure the plug is gapped correctly.

SOURCE: Check engine light comes on temporarily - engine chuggs at idle

Before changing you pcm try cleaning your egr valve. remove the valve and see if its stuck in the open position if so use a small pick to clean around the spring.

SOURCE: 91 LEGACY STARTED RUNNING ROUGH

The cylinders are numbered as on the spark pack you changed. You might have done better putting the seafoam in the tank as an injector cleaner. Not sure why you changed so many parts, you seem to know how to get the codes from test connector lead hookup and the blink pattern. You might also want to check the fuel rail pressure and the crank and cam angle sensors. Before replacing the injector, swap the #4 injector with the adjacent one and see it the code moves with the injector or stays put. If the code stays on #4, then check the injector wiring, if it moves clean or replace the injector.

SOURCE: knocking in engine

If you are pushing oil out everywhere, and it's knocking, first check the pcv and vacuum hose (or ccv) if it's clear, I'ts likely you have a serious engine problem...likely a failed bearing, and possibly a piston problem as well. Check your oil pressure and do a compression test to se what's going on in there.Since #5 is showing a code, pay attention to what you find in that cylinder.