Engine light showing

no year car told and is the 2nd question buy the service manual.
country, year, model and engine
Mitsubishi engine
buy it best ,chapter 9 is head

https://procarmanuals.com/mitsubishi-4g9-4g92-4g93-4g94-series-engine-repair-manual/

free view page 20 there shows it is 20 nM _90deg, + 90degl.

CHECK THE TIMING

Fuelpump..pressureregulator or injectors/computor cud hav issue-injector drivers cud b gittn hot from age. A data stream done on car will confirm. Dont go to a dealr

idle control valve. bad plug wires and bad plugs will all cause that as well as a air leak in the vacumn hose on galant

To me it sounds like that your timing is out, take it to get checked out.

you need a special socket for your car. its deep socket with thin wall. what i did was to bring my socket to a machine shop and made my tool thinner

I have newly purchased a RVR with an engine 4g93 I noticed that there is Turbo or intercoler 4g93T, my I ask if it is possible to convert my engine from 4g93 to 4g93T? pls. advice me ASAP, thanks to you all

the correct transmission fluid is ATF+4, any other trans fluid will spoil the transmission.
i use platinum spark plugs in my engine, works great.

it could be the spark plugs, at least that is what it was for mine, if you have over 50k miles without a spark plug change i highly suggest one, also a oil /transmission change would be great for your car too if you haven't done those reciently. I would also suggest using a higher grade gas, sometimes this fixes the trick too.
If you try all those and still experiencing hard transitions please let me know and i'll try a more indepth analysis on your car.
Thanks jyotsna.

Is there spark at the plugs and fuel at the engine?