Q: Car hesitates only on cold starts - 1997 Dodge Dakota

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97 dodge Dakota hesitate only on cold starts. Clears up completely after a minute or so of idling or driving about a mile. After the cold hiccup stage it runs great. I have changed the iac, tps, pcv valve, plugs, wires, cap and rotor. I don't mind letting it warm up for a minute but I'm afraid it could be a sign of a more serious issue. There isn't a check engine light or trouble codes. Fires right up. Almost as soon as I turn the key. You just can't drive it right away unless you want to deal with the slight hiccup the first mile. Gets decent fuel mileage for a 318. About 14 in town and 17-18 highway. I have searched around for vacuum leaks but can't find any. I can't figure it out. If I let it do its warm up ritual I can get strait onto the interstate and run 80 mph no problem. No problem while driving either. I just just went on a 300 mile trip with no issues at all.

My car has 150000 miles.
My car has an automatic transmission.

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