Hi I have a 2002 blazer LS 4.3 v6 runs rough has a hard time idling on its own without stalling but when it does run it runs really rough and blows black smoke out tailpipe just put new
plugs and wires on it but did not change the cap and rotor can you guys help me out.

 

Too much fuel for whatever reason. Possible leaks somewhere in Injection spider assembly or fuel pressure reg.

 

• ok I will she k those out thank you for the reply and help