I have a similar issue with my 35s13 2.8 I turbo inter cooled. Mine will just cut out and the injector light will flash 5 or 6 times and get going again. This will happen anytime and will even cut out on flat going and on cruise control, up hill or down and even in 3,4,5,6 gear.
Some times it will go for 120-150 Kim's without doing it then will do it 20 times in5klms, but will keep doing it till the engine stops and cooled down.
I have replaced all hoses and clamps and checked fuel pressure to the high pressure pump and there is NO air in the system at all.
I have checked the contacts on the sensors and my next venture will be to locate a obd reader to check the ECU and circuits?????
If anyone can enlighten me as to the cause I will certainlly be appreciated and shout a beer.
Jim Steedman, January 2014