94 silverado problems
 

i have a 1994 chevy silverado. it has a 5.7L 350. i trying to figure out whats wrong with it though. if i floor it from a dead stop it starts to pick up speed and the it just stops at like 3 thousand rpms and it drops down and then tries to pick its self back up. i was thinking the sending unit for the fuel but i dont know alot about engines so i figure id get some other views on it. thanks.