Nissan Maxima 2001

Hello friends, I have a Maxima 2001 that brings me desperate
I started with the failure to start, but already hot it started well.
Then he started to stop only suddenly and to start after a while.
I put the scanner and I marked p0505 that is the IAC,
then still in late to start, but the fault no longer appeared.
Another thing that brings is that when the rev willing down and know but only when he is instead, in Park he stepped on him and accelerated well
no longer to do, any code no longer appears to me,