hey guys, this is my first post so bear with me

just today i started my car and just as i put on little bit of pressure on the accelerator the RPM dropped heaps as if the engine was about to cut out then i put more pressure and it went back up to about 2000rpm.

I restarted it like 5 times and out of the 5 it happened like 3 times.

car is on dual fuel ( this happened while car was on premium) and i did error checks and coming back 76 (air fuel ratio)

i have a slight idea what to check but wanted a second opinion.
Anyone know the key problem??

Thanks in advance