My vrs seems to take longer to responed before it was strait there savage now it hesitates more at lower revs its still fast just not as fast any ideas ????

Get it scanned. Have you changed any parts recently?

Changed crank sencer oil pick up pipe and sump. I got a load hissing noise on low revs sounds like the dump valve to me just got a delivery fault code reader and baily dump valve fk98 looks crap to me blanking plugs and wants me to start cutting holes in my intake pipe lol anyway got fault codes 16706 and 18010 and 16396 any idea what these codes indicate ???