okay so the issue is when my truck has been sitting out in the heat all day or hasn't been started in awhile. i put my key into the ignition and try to start it, it turns over like it wants to start but doesnt so i stop and then go for round two where it immediately starts up! if anyone might know what the issue is please help me!
i have recently:
changed fuel filter
added lucas oil fuel system cleaner twice about to do a third
and added a cold air intake
154xxx miles

the problem started around the time i added the cold air intake but not exactly then a week afterwards probably, i feel like that is just a coincidence but idk SO ANY HELP WOULD BE AWESOME!

thanks
Zach