I have the following codes on my 3.2 p0443 p0300 p0304 p0175 p0306 I do know what the codes are but don't know where to start it seems atleast 4 of the codes are related but I'm wondering about the fifth p0443 Evap emission control. I'm having hard starting problems and black smoke PLEASE HELP!!!!!!!!![&:]

 

P0442-EVAP LEAK MONITOR MEDIUM (0.040) LEAK DETECTED
P0300-MULTIPLE CYLINDER MIS-FIRE
P0304-CYLINDER #4 MISFIRE
P0175-2/1 FUEL SYSTEM RICH
P0306-CYLINDER #6 MISFIRE

was something done b4 this happened I would not see all of this at one time to be normal.

 

When I first put the scanner on it, the only code was p306 Changed all spark plugs pluse #6 coil pack erased codes had same problem immediatly took engine light a week or two to pop back on. What I can say is it went without attention for a few months[] I'm sure that didn't help the situation

 

something eles I must mention is that an vacum line that hooks up at the top of the intake rear of engine sometimes gets blowed off