Why does my truck need to be started up so many times?

I have a 1987 ford ranger v6 2.9. When I start up my truck cold start it will take 3-4 try's to get it going steady. Unless I slowly rev the engine after I first start it, but I try not doing that. Even when I do the instant I take my foot off the throttle the engine will almost stop turning, until I slightly rev the engine again. Without revs and letting it do its thing, I'll need to start it up 4 times at least to get the idol to normal. Has oil, spark plugs are good, wires still soft, fuel filter changed last oil change, air filter recently changed, clutch seems good still. Haven't had any issues with the clutch or drivetrain so far at least. Also, if you are familiar with this truck, any advice on things to do before they get bad? You know, like specifically for this year and model truck? I heard this year and model ranger needed some upgrades or something.

Choke working?
No intake / vacuum leaks (These effect cold starts, less noticeable when engine is warmed up).
Spark plugs giving good spark? (Blue / purple in colour).