Hey guys... Iam having a polo playa 1.6i 2001 model

[CHARNOCK]

My polo Playa 1.6i 2001 model have a problem, service th car and took also off th throttle body 2 clean it.

Put everything back, and nw th car don't want 2 drive smooth anymore... He have a jerk in him when I feed more petrol and it's loosing power.

I did a diagnostic check on it and clear all th faults, and everything was showing fine

But it's still making that jerk

What can b th problem...
Is it timing and what is th timing marks on it