Engine tends to stall or hesitate when moving after a stop (e. G. , at a traffic signal).
Instant pickup problem – feels like it's going to stop.
Sometimes has starting issues.
Normal driving (once moving) is okay.
Parts already replaced/serviced:

Crankshaft position sensor

Spark plugs

Fuel pump

Throttle body cleaned

Vehicle jerking and bad fuel economy

Vehicle jerking poor and vibration in gas padel, bad fuel economy.

Engine jerking, refuse to accelerate and have problem climbing hill, it also power offs if not accelerated continuously

Engine jerks when on idle

I went to heat up the car this morning before leaving and I turned it on and then turned the heat on and hit the rear defrost button and the car started jerking and idling very very rough almost about to die. I pushed the gas pedal a lil bit and kept the rpms up to about 2000 and turned the heat off. It never died but we literally haven't had this car a month and financed it. And when this happen I smelled something that almost smelled like paint thinner but maybe it was gas but it was a very strong smell. Any thoughts on what to check first or has anyone else had this issue?

My 2018 Hyundai Elantra has started hesitating when I accelerate, especially when pulling away from a stop or going uphill. The engine sometimes feels like it loses power for a few seconds before responding normally again. There are no unusual noises, and the car starts normally. Has anyone experienced this issue before, and what was the cause?
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Whenever the temperature socket is connected the begins to jerk and experience hard starting and sometimes refuse to start.

Fluid levels are right where they are supposed to be but when going from gear to go it hesitates and then slams into next gear. Also when I put it into reverse it takes a second then goes in. I have the touring g model elantra not sure if it makes a difference or not.