You can and should also check the coil pack after its ran and gets hot, and see what happens that's probably when you will have the problem with it, when the pack gets cool again things go back to normal making it hard to diagnose, remember the problem happens when the car has been running and after everything is good and hot, that is what we call simulation and that's how you can be more accurate in diagnosis, no a carboned Throttle body will not cause those problems, the problems associated with those when they get carboned is after you disconnect the battery and go to turn the car on it can suddenly die and not want to run at idle but under acceleration it is fine, this happens to a lot of vehicles when you change the battery and erase the cars memory in the computer usually on cars with over 60K miles or higher, it can not find the right spot for the AIS motor to reach to keep it running at idle because it goes back to factory settings, which is why it is good to clean the TB when you change the battery on any car to avoid this, use a good Throttle body cleaner I like 3M and use a rag and wipe it out, and make sure you clean the butterfly you don't need to saturate it that is unneccessary just use enough to clean it, and do not by any means use carb cleaner it is not the same and should be avoided.
Also what plugs are you running there? you should be using champion the copper ones are fine chrysler motors are designed for champion plugs only and a different plug has a different wear rate, in that porcelin insulation there is a resistor and different brand plugs have different size resistors in them, 3.3's normally are not fussy like the 3.5's those act like a real bear on a different plug after a while I seen people get close to junking cars with those motors due to bad plugs or using anything but a champion, and when you tell them its the plug they are like no way I just changed those not too long ago and thats when I tell them and they go I heard champion plugs are garbage and I tell them don't believe everything you hear use factory OE parts to avoid problems that's why it is put on a tag under your hood with the proper gapping. Also a bad plug will cause a misfire that you will notice at idle and more on acceleration and you can detect on a scanner or a live data code reader by simply changing the plug in the misfiring cylinder to another cylinder and you will see the miss change to that cylinder its real cool. So I doubt you have bad plugs, I am still banking on your coil pack, they are not expensive to replace either, 35 dollars us is the most I have paid, denso packs were made in japan bet that's what you got, coincedentally Toyota uses the same brand even the starters and you can fix a denso starter for 5 to 10 dollars on that car too. I love having Chryslers don't know why America still prefers GM garbage. I sure love the money they pay to work on them though. L.O.L. Also another thing that makes cars act like that under acceleration is the oxygen sensor but that usually throws a code as well, but this is another thing your ecm relys on for air fuel ratio, remember oxygen sensors only detect oxygen they are not fuel sensors, so the ecm regulates the amount of fuel based on the amount of oxygen in the mix, if the sensor which is a galvanic battery and changes voltage based on engine temp to indicate mixture, to test this you will have to use a T-Pin and go into the the connector with the pin find the pos. output put your volt meter to dc and warm the engine to normal temp run it at 2000 rpm for a short while, now ground your meter and hit the T-pin a good o2 sensor can switch rapidly and should fluctuate and change voltage as the engine warms, you can do a before the engine warms test and after to see the difference. If it is slow to change, change it out or if it does not change at all in volts change it out.
Checking the fuel PSI on the rail isn't bad either, you can rent most of the tools from crapzone or autozone, they are not bad in that aspect. How is your fuel economy on the car is it bad or good, has it went down, increased, changes in fuel economy can help pinpoint problem areas as well.
Anyone can change parts on a car, but to be able to diagnose and know how is what makes you an auto technician.
