manic

If it was a sensor it would throw a code. With a fuel pump you cant
tell by listening to it, although if you dont hear it ticking that is a sign
of failure. Might be a bad coil out of the box, it gets hot and fails..Might
be a intake or vacumm leak,, hard to say. Its not throwing a code so
you have to look at things that the computer doesnt monitor. You say
that when it stumbles and you put your foot down on the gas it takes
off but leaves a puff of black smoke. Tells me the gas is pumping, maybe
to much, maybe not, but the gas isnt burning. So that takes you back
down to fire...