Estimated mr. After reading your comment and being able to help you in something, I tell you that there are 4 reasons why a gasoline engine does not work independent of the brand and the model and be as practical as possible without so much technicalism 1). Compression in cylinder 2). Spark in the spark plug 3). Lack of fuel (gasoline) 4). Out of point.
You mention that they conclude that it could be the computer (ECU) and I checked it and everything is good how they came to that conclusion, but you check if you really arrive at the spark plugs, it is easy only to rise one and connect it to the spark plug cable that corresponds and supports the spark plug firmly to mass and that someone of a little starts in the contact sheet and you observe if there is a spark in the spark mass spark plug anywhere in the engine and if there is a spark you can rule out that fault.
After I checked the ECU (computer) and try that the spark plugs were wet with gasoline that presumes that gasoline reaches the cylinder and that the injectors work badly or well but they work.
Check the compression and finally the tuning.
Finally, I would like to ask him after he began to give him the problem to help him with more pressure, he will soon solve his situation.