2013 JKU automatic, 3.6 135,000 miles. Just started few months ago and cannot figure it out!?!? In the mornings cold start. Jeep bucks/hesitates/ feels like a teenager driving a stick for the first time. When the engine reaches about 160° the bucking/hesitation dampens then goes away. No light as USUAL. No codes. No pending codes. Reminds me of someone gasping for air lol. Fluids and maintenance are up to schedule. Engine and transmission pur like new. Fuel pressure good. No slips, shifts smoothly on point. It’s just the first initial cold start OR if I don’t drive for few hours and do a cold start again it happens. Thoughts and suggestions would be appreciated. Thank you!