Hi! I'm new here but desperately seeking help. My car has trouble maintaining it's normal operating temp while idle/driving in traffic. I live in Florida and the temp out today was 99°. I have to sit idle in the parent pickup line for about 45 minutes. During that time, my temp climbed up to 228 before I turned the heat on to get it to cool down. It never cooled down or maintained temperature on it's on. Parts that are new in the car: Thermostat, Radiator, temp sensor and cooling fan resistor. At this point we're almost out of money to throw out at it. It's a 2011 dodge journey mainstreet V6.