following is done once on saturday:
flushing of complete brake oil with dot-4 fluid
re-check of calipers, pins, brake hoses, pads
braking have definitely improved after new brake oil and all this work, however, my intermittent issue of sudden brake pedal hard and car sharply moving towards right is still there - and as discussed before, this happens say just 2-3% of times and when i pump pedal, or turn off car and restart it, it goes away and pedal becomes normal with good braking power back. is this brake booster or what? can brake booster stop working all of a sudden and become ok itself?