No power after cleaning fuel injectors

Spaz

I have a 2009 370z with 20k, had an oil change and fuel injectors cleaned, as it was suggested every 15k mi (not sure if thats true). I drove it 10 mi without any problems, the next time I went to drive - it had no power, was idling at 1200 rpm even when the car was warm. When I would press on the gas it would hesitate and wouldn't go higher than 2000 rpm and sounded like it was being governed. It had no power and was barely drivable. I drove it home that way. When I got home, I turned the car off and restarted it - the problem was gone. I drove it around and it has been fine since. What could have been the problem?

I purchased the car brand new and it has never had any problems.

Could it have been the computer? I drove long enough that any remaining cleaning solution would have been burned out.

Please help