hello, as the title says and would like to add that after it dies, it starts right back up. as i said it runs. when it gets low on gas it misses and dies. when it has gas it is really sluggish and the gas petal is heavy when i press it. delearship couldn't find anything wrong with it. yet it messed up after i got it back from there. did the fuel filter friday evening. did tune up with fuel injection cleaning. we're thinking it is something in the engine. my mechanic yesterday morning mentioned something about a crank sensor or an ignition censor and that since it runs he's almost positive it's not the fuel pump. please help