the motor is B18b1 with gsr head . the car start on cold start fine , warm up process is fine , drive fine , in gears fine , nothing wrong , until i hit a road bump , then i can tell that my car hesitation bogging then bucking . and i shifted back to neutral to see what sup , then the car died out on me while the vehicle is still in motion. i then restart the car and it start right up and drive perfectly fine until i hit the next bump. if i dont shift back to neutral , then it bogging bucking until i give it gas and it go back to normal .

cliff note

hit a bump , car start to hesitate , bogging , bucking , misfire.
shift back to neutral then died out on me.

hit a bump, car started to hesitate bogging , bucking , misfire
if i dont shift back to neutral and keep going then give it gas a little bit more then it return back to normal..sometime even wont return to normal.

stuff that i have change with my friend.
fuel filter
new NGK G power
clean iacv with brake cleaner ,
have checked all the ground and everything seem fine
checked all the sensor plug and injector plug and all seem secure
checked the connection of the fuel pump under the back seat and it seem tight
will replace TPS tomorrow to see what sup
and will replace map sensor from autozone to see what sup
in the mean time anyone ?

 

The TPS is set from the factory and shouldn't be messed with if it is still in its original position. You should check for codes and see if there's one in the memory. Missing when hitting a bump means a loose connection somewhere but without a code it'll be hard to find.