ok so yesterday we did a fun run for half the day samurai ran great came home parked it it sat till evening then went to take it out again and it wont idle at all it will drive but like when i come to s stop it dies and when i hard accel it has sections of power then flat spots also if i hold the rpm at like 800 or 1000 it putts like its sputtering anything above 2000 runs rine any help please i cant figure it out

Try checking vacuum lines.

Mine did the same and it seems the cause was rotten vacuum hose going from intake manifold to air filter housing.

Yep, same here. Vacuum hose from maniforld to underside of air cleaner.