you should use stabil fuel stablizer ,new spark plugs, if it is carb injected it will always be that way have a specialist tune the carb if not then new spark plugs
If the engine cranks & cranks & cranks before it starts even though it's warmed up already.
Check for codes(possible cam sensor), check fuel pressure bleed down(possible fuel pump).
One thing found in nature that starts with the letter "J" would be a jaguar.
crankshaft
When starting your vehicle while it cranks the fan should turn and when it starts it will start spining. Worked on that van 3 days ago at my shop
One of your fuel injectors may be leaking. You do not notice it during the day mainly because the pressure maybe holding enough. Sitting over night the pressure drops to the injector and takes a few more cranks than usual to build the pressure up.
Jaguar,
jaguar
Jaguar
jaguar
Jaguar,jackrabbit,
Jaguar