Unstable slowdown from Daihatsu Cuore

HELLO EVERYONE. My problem is as follows.
I made refinement with injector cleaning and acceleration body, to a daihatsu cuore of 97.
I also changed the distribution belt and the tensioner and
when starting it, it starts well and when the slowdown was heating, I am very unstable, the 800 to 1600 rpm approx
some idea?
THANK YOU

It could be solved with a computer's recipe, however it checks that there are no loose hoses, perhaps only the step by step engine was deregulated.

Thanks for your help, but already check the empty hoses and are ok.
Reset the computer disconnecting the battery and neither
the step by step by step cleans and lubricate it and nothing remains the same

I have had that problem with one if not with several farm the problem is wear on the fin of the admission entry body. Buying very easy put on a piece stop down the fin with the vehicle in idle and you will see the difference to you that happened to clean the body of the butterfly, what I do is send the fin.

Friend in any case the computer's reset is not enough to disconnect the battery, you must also open and close the contact once the battery is connected, about three to four times at intervals of 15 to 20 seconds.