Hi guys, i have a escort rs2000 standard brakes and the pedal pulses, where should i start to look first.?

Maybe warped front disc .

cool thanks for that i have a new set of discs, just waiting for callipers.

Warped discs 'can' result in a pulsating pedal however more commonly will result in steering wheel shudder under braking.  Pedal pulsation is more likely to be due to out of round drums on the rear.  gently pull some handbrake on as you drive down the road and see if the pulsation also comes back through the handbrake lever.

nice one  will check
thanks