Problem with a Ford Ranger 4.0 engine

Please, I have a problem with a Ford Ranger 4.0 V6, the engine was bought rebuilt in a US Ford agency, it is imported for Honduras and here in my workshop the rest is armed, but I feel that it has little strength and does not match, it feels with a vibration, someone who can help me please.

Jamoza is very little the information you give, but if it is rebuilt in the United States you must motorway and give about 1000 kilometers of filming before adjusting anything, so it is done here in Chile when a complete engine is adjusted, on the occasion they are tight and the use returns to their normal walk.

I thank you very much, I will wait for those thousand kilometers and then to review everything again, I will give you a little more information, the truth is that what you feel is as if I lost spark, first I will change the spark plug wires and check the AIC valve, then I plan to check the EGR, we continue in contact, I thank you very much.

No problem Jamoza here we will be.