The weather isn't cold its pretty warm but i am still having trouble starting the car when i turn the key it just isn't getting a spark.

i am also going to have my feul injectors cleanded at a mechanic friend of mine donno knowif that would help.
i also smell gas under the seat behind me whenever i fill up the car i think it is leaking.(i better not start smoking) do u think haveing these parts changed would solve my problem?