someone could help me

 

up

 

give more details

 

We need a LOT more Details as to what happened to your OLD engine. And WHO installed the new engine.

 

Ok i try but.... the car sound and run great, no vacuum leak , around 4500 rpm to the red line the engine don thave more power, when i shift in 2 gear the tire doesn't slip, 1000 rpm to 4000 4500 i think i have a good response.

 

have you been to a dealer?

 

Yep but not for the engine, it was for the air bag recall, but technician said something about the comp , he was sure that my car was chiped cuz his comp detect some code, i hope you can understand y chinese LOLL!

 

ok cobraX, it sounds like your
PCM (computer) might have
a custom tune in it.

if the tune does not match your
modifications, this might be a
problem

 

Ok i understand that but i didnt any mods on the car just change stock head for stock head cuz it was broken.

 

something is not reinstalled correctly then