kia forte ex-2014
engine hesitates when driving during the day
engine hesitates when driving at night and lights flicker
had it in for service, couldn’t find problem
What do mean by “engine hesitates” ?
How many miles on the car? What transmission? How long has it been doing this?
Check to be sure that the battery terminals are CLEAN and tight.
Yosemite
Original battery? Probably time for a new one, with clean connections.