Starting issue only after sits more than overnight
 

I have a 91 stealth n/a car with 140000 but got overhauled @ 125000. Now this winter there was only about three weeks that was consecutive were I wasn't driving the car nor was in town to start the car regularly during this three weeks. When I first went to start the car after sitting (3wkz) it fired right up but then the next day it just cranked but I could hear it wasn't even tryna hit and after ensuring I had spark I squirted just a minimal amount of starting fluid into the pcv location on intake and instantly soon as the key engaged it fired right up and runs completely fine and as long as it don't sit more than 12 or more hrs it fires right back up but any more time sitting parked and I gotta give it the smallest shot of starting fluid otherwise it just cranks with no attempt to actually fire. This is my first stealth but I had 3 3000gt before this stealth and Never had a simple but pain in the ass problem as this lol could anyone possibly shed some light on my situation or suggest anything please it would be appreciated thank u