2000 Jeep Cherokee no idle when cold has new IAC motor and CTS

TPS - throttle position sensor , possibly ! Seen this a bunch of times . Use factory part , jeep , chrysler ,dodge don't like aftermarket parts

I would check the IAC stepper motor plunjer (idle air control). Dirt can build up on the plunjer and the air canal and will disturbe the idle control. The IAC sits on the throttle body.

it could be a new bad IAC motor...especially if its an aftermarket brand!! something like that even though the part is a little more expensive go with OEM jeep parts, especially electrical stuff.

check the iac motor and fuel pressure

the iac ( idle air control ) needs cleaned or replaced. it controls the idling of vehicle. Also, try cleaning your throttle body. It's probably quite filthy. you can use carb cleaner to clean iac. but do not put body of iac in any liquid, just clean the valve on end. do not push it in they are preset for proper idle. have a good day !!

check for broken pcv valve

the iac probably has carbon built up around it this controls the idle speed try cleaning it first,if not it could be a bad iac or a vaccum leak that the iac takes some time to compensate for to control idle.

The iac would be my first guess but this troubles me as the when the engine is cold all the sensors are ignored until the fuel system goes into "open mode" but to change the iac is simple 2 screws and unplug the module and instructions come with a new one to tell you how far the air pintle is supposed to be set at,
If you can change your own oil than this is easy.
I did rebuild wrecked vehicles for about 15 yrs and gave it up as back in the day we never wore mask's and hacked up to much hardner so now I just fix them,in a chrysler,jeep dealership of course.

check your transmission fluid,the motor will stall when fluid is low

yes its the iac "idle air control" they go bad also loose batt conections cause this problem good luck