Meriva problems put on time

Hello, I have problems with a 2008 meriva, its engine has a double camshaft, tube a heating and it was necessary to change the head packaging, when the engine heads down, its revolutions do not pass from 700 and when the machine is accelerated, but when lowering speed does not go out but the engine begins to head, they tell me that it is out of time, they would hate me. Thank you

How do we help you? What do you need? If the full data of the car, displacement, model year and that is worth it.

If what my good kikemec says, depending on the country, it can be the IAC valve or the acceleration body does not handle Chicote pa accelerate is an electronic tps with a sensor on the pedal, for not the big story is reprogrammed by the idle with a scam greetings.