chashy

As many of you suggested including Davy, I also thought ECU is still learning. Now, it starts without a problem in the morning. Yesterday, same issue came when I parked the car after driving for one hour and tried to restart it. The rpm just dropped to zero and engine stopped. If I keep the accelerator pressed and hold for some time the issue disappears. Could this be usual as well? Thank you.

Hi guys, I have been using this forum for a while but this is my first post. I did an engine tune up on my suzuki swift HT51s model two days ago. The mechanic replaced the plugs. Everything was fine until yesterday morning. The car started but the RPM needle quickly comes down to zero and the engine stops. I accelerated the car to make sure the needle does not drops but when I release the accelerator peddle the engine shuts down. After couple of attempts the engine starts and runs as usual. I felt this today morning as well. What could be the problem? Thank you in advance.