vs 5lt engine dead spot

[filthy]

howdy all , hope someone can help . i have a dead spot when i first start the engine that lasts for about 1 minute. this then appears to go away and i have full throttle control with no deadspot.
i have replaced the tps and the iac motor and it still doe's the same thing. this a series 111 5lt vs ute by the way.any idea's?

 

[VrWagz1]

coil or ignition module i would say, leaning more toward the coil though. But could be moisture in the dizzy cap too. Could even be as simple as plugs and leads too.