I hit a bump coming down a hill then it died now wont start its getn gas and spark still wont start

SOURCE: 97 altima wont start, engine turns, radio, lights

Oil is leaking getting into the cylinders which is being burnt which is causing the white smoke from the exhaust. You might have compression problems or worn valves.

SOURCE: 97 escort wont start with new serpentine belt

check to see if the injectors are working....

SOURCE: I HAVE A 2002 PT CRUISER I WAS DRIVING DOWN THE

CHECK YOUR BATTERY LEADS EITHER ON THE BATTERY OR THE EARTH WIRE TO ENGINE AND CHASSIS OR FEED WIRE TO STARTER MOTOR
unless you have a fuse or relay jumped out
but you must have been going fast for that.....

SOURCE: 97 ford f250 5.8 starts then dies as gets warmer

sounds like your engine is on its last leg. have you checked you push rods the could be bent usually due to over heating or a rocker arm is bad and valves sticking, or timing is wrong

SOURCE: 1993 Chevy Silverado PU 1500, backfire, sputter, die

they might have not put the proper gap on the plugs..and might have over filled the engine with too much oil..