My gtr has started to do this recently too. After I put in bcpr7es spark plugs it would only do it when u go to restart the car when hot. Plenty of cranking then when it does start revs r very low so u tap the throttle and it picks up and idles perfect.
My cold start was perfect up until yesterday, now that's gone shit too
I thought it might of been those plugs so I put my old iridiums back in but same problem
Cars got sard fuel pump, nismo 600cc injectors, -7 turbos, and nistune...only been road tuned
Any ideas on what it could be??? Driving me nuts !