It happens everytime i start the car when its cold. (Every morning)
Its starts fine, but when i begin moving the engine chokes. I cannot push the pedal deep. After a few minutes or after 1 Km the chokes stop appening.
sounds like a problem with the cold start, possibly overfueling, i've never come across it on any of my previous twinsparks, the only power loss problem i've ever had was oil leaking from the cam covers down into the spark plug recess and tracking up the leads shorting them out briefly, this did mainly happen when cold but was very intermttent and dosen't sound like your problem, hopefully someone else will have the answer for you, good luck.
Sounds just like the problem I had when my air flow meter (also called "MAF") failed.
Check this forum and you'll find several older threads covering this and even covering taking it off and cleaning it (don't know if it would've worked on mid - garage changed it before I found the site - but just cleaned current one following the instructions I found). Recommend if you try and clean it you use hi-alcohol (isopropyl?) spray like carb cleaner or brake cleaner rather than WD40 which might leave a residue.