No acceleration and no engine revs from a full stop?

My car is kia carens CRDI 2.0 automatic.

The problem is when from a full stop, The car moves but no engine response when stepping on the accelerator pedal. The engine will only respond after a few moment or probably 3 to 5 seconds.

Another problem is sometimes it loses power on the second gear when Gear 1 is shifted up from or before the red line, resulting no acceleration or in a constant speed - and will shift down to gear 1.

Mileage is already 108000 kms
Newly changed timing belt
New atf fluid
Change oil will be done by mext month.

Added (1). 2008 model

Added (2). New fuel filter

Added (3). Any nonsense answers will be automatically flagged down just like member "Monitor".

Added (4). I brought the car to a mechanic and they managed to fix it. Oh and by the way, those members who answered (one guy in multiple accounts) didn't helped me a lot. I just can't keep laughing why they were keep answering where they don't know cars. Kia? Oh please. I only bought a second hand kia because it was only a home service for my veterenary clinic. I own 4 cars not only kia. I have Toyota Fortuner 2016, Ford Ranger 2014, Mitsubishi Montero Sport (not the one that has SUA) and a Kia Carens.

Ok I'm

You have a Kia and you want acceleration!

Sorry, sorry, I opened up a fistula laughing. I needed to wipe the blood I coughed up laughing. Not sure if I can go on. Find an Independent garage ans see if they can patch it together for a few more trips.Duct tape and "miracle"oli treatments.

We brought the car to a mechanic and they managed to fix it. They did something about the ECU. I didn't know Kia cars would be this bad.

Oh and by the way, those members who answered my question, (one guy in multiple accounts) didn't helped me a lot. I just can't keep laughing why they were keep answering where they don't know cars. Kia? Oh please. I only bought a second hand kia because it was only a home service for my veterenary clinic. I own 4 (three of these were bought brand new) cars not only kia. I have Toyota Fortuner V Diesel 2.8L 4x4 AT 2016, Ford Ranger Wildtrak 4x4 3.2L MT 2014, Mitsubishi Montero Sport GLX 2.5 diesel(not the one that has SUA) and a Kia Carens crdi 2.0 AT.

Sounds like a turbo issue. Get it checked out.