Car stalling

Danwitha370z

A weird thing started happening to my car last week.
So ive noticed when ever the car is parked on my driveway (on an incline),
and the car has been driven and parked for about 10-30 min or so... and then go back to drive it again,it would just start and then die right away.
It does not do this on a cold start or in my garage on flat ground?

The only way i can start it again is if i give it some gas and then it starts up and runs just fine.
It is really weird thing.. i cant come to the conclusion that because the car is on a angle that it wont start...but that seems the be the only difference when parked on the drive way over being in the garage.

I have mods and am tuned...the car runs great otherwise.
I do have a exhaust leak i need to fix so maybe that is a part of the issue?
Also it started happening right after i had a hard scrape when driving the car on a bumpy road and the car took a good jolt..maybe a sensor got misaligned?
The car has NO CEL and runs fine... i am just puzzled because i dont even know where to start diagnosing..

Any help would be fantastic.