The car im wanting help on is a 2003 MK1 ford focus

Right so been having this problem with my steering.. so say i go to take a left hand turn the steering feels normal but if i got to take a right hand turn the steering feels really heavy and can sometimes make the car feel as if its sliding (it happens on any road wet/dry doesnt matter)

Ive had mechanics look at it can they say theirs no movement or problems with my suspension, steering rack or power steering it all meets regulations or something.

Ive also had my tracking checked and tires have 6.5mm on there and there Pirelli tires on

ive noticed it only when the front left hand side takes weight of the car is when i have to problem..

Anyone got any suggestions on this??