2001 Accord 4 cyl Engine shaking and loss of power

My car is backfiring, engine is shaking and it
loses power, especially on hills. To accelerate
especially in lower gears i have to press lightly
on gas pedal - if i step on it car will immediately
bog down. Sometimes when i am accelerating
it feels like its not getting enough fuel and then
may suddenly feel like its running normally.
Codes are for random misfire.  I can also smell
gas when it is running poorly. It has new spark
plugs. I really dont want to just throw parts in.
Im really hoping someone can point me in the
right direction!