Chevrolet Spark

Holas good I have a problem with Chevrolet Spark who works unstable because it does not reach a voltage from the Ecua a coil and does it work very badly? Well my query is the following

I can get the ECU and try the ECU from another spark to see if it fails?
Or do you have the vehicle for this?
If someone save says .... It is appreciated from Manoo

Generally I never recommend trying a computer in another vehicle, because you say you that does not reach a voltage? The most caused thing is that the coil is damaged, you can try feeding the coil with direct current to call it that, but I am almost certain that it is the problem of the coil.