cold starting issue

Hey all. Need some serious detective work here. At my wits end with a fail to start, first key turn. Been chasing this for 2 months now. Symptom. 1st key turn cranks but no fire. Key remains at "ON". wait 5 seconds, turn key, engine fires. Only happens of first morning start. Ambient temp 15C...

Greetings All, I'm Travis and last December I purchased a 1KZ-TE KZN130 Hilux SURF from Japanese Classics. 80k km, 5 spd. She's been a good truck so far but she just started having a cold starting issue. First start of the day, she will crank over more that normal before finally lighting off...