I rebuilt the engine, have a hard to start the engine, dont pass over the 3000rpm, black smoke through the exhaust, check twice the timinig, i change the camshaft sensor and crankshaft sensor and have the same problem.
Some one can help me

 

thick black smoke, hard to start......running rich? Not where I can check the codes right now but have you went through and double checked all your electrical?

 

Do a fuel pressure check as well. Bad fuel pressure regulator can result in the same issue.