Weird no spark during warmer weather problem!

[S13_RB25]

Hey guys and girls i recently got a 91 SE coupe and it has this weird problem where it starts up in the cold weather but once it gets warm, like in the 50s and up, it gets no spark. Ive searched around about this too but have had no luck. Also once its fully warmed up and I drive it, it likes to stall when coming to a stop. Like no struggling to around 500-700rpms, just straight to 0rpms. One thread had the battery be the weak point but I jumped it and it just cranks over and over and doesn't want to act like it wants to start. It gets fuel, I can smell that out the exhaust. But other than that I switched the coil, ignition module with my hatch and still have no spark. Now before i go out and buy new parts, how do grounds come into play? The less I have the more chances of it not starting or?? I need any help and/or pointers i can get! Thanks.