2007 Yaris ( South Africa ) Accelerator problems

[Toy Boy 6]

Hi Guys,

Just wondering if anyone could have a possible solution for me.
My Yaris( 1.3 16valve ) 2NZ-FE, seems to have a problem when wanting to accelerate.
Start the car without pressing the gas pedal, its fine.
Once you attempt to press gas pedal, the engine light comes on and then when you press the gas pedal nothing happens unless you depress it all the way and eventually the car will rev up.
I have already cleaned the throttle body, ECU, MAF sensor, serviced the car as well.
The starnge thing though is last night i had it jacked up in the front and when i cleared the ECU, started the car pressed the gas pedal engine light came on, but pedal was responding as per normal.

So this issue is really confusing me.

Any help will be greatly apreciated : )

Thanks.