R32 Gtr Issue

[yohoRB26]

Hi all, story is went to Lakeside for first time attack day in my r32 gtr. Straight away i noticed that under heavy breaking and cornering that i really had to fight the steering hard, it felt as though it would not turn in because it suddenly became really heavy. As though no power steering feeling. It did cause a few awkward lines into some corners and a bit of under-steer and certainly didn't fill me with confidence to keep pushing, strange but then for some corners the steering was light and direct how it should be. No sounds or wineing from p/s pump either. Car still has HICAS and some people at the circuit said it was from the hydraulic fluid for the HICAS not returning quick enough..

if anyone could shed some light or has had this issue please let me know what can be done

[DVS JEZ]

Is ur speedo working correctly? There is a speed sensitive steering module under the parcel shelf. Make sure that is connected properly and see if there is any fault codes.