stallswhenhotoutside

Would need more info here. What temperatures are deemed hot out? And what temps are deemed cold? How does the vehicle react when started cold and run till the engine is hot? On Fords we run through self tests to see if the control module finds anything itself. I'd want to look at several different data pids like coolant temp readings, oxygen sensor readings, fuel trims, misfires etc. There are plenty of instances when the coolant temp sensor says the coolant temp is 20 degrees when it's really 100 degrees, in this case the ecm will over fuel the vehicle. There are other instances where certain intake gaskets leak air into the engine when under certain temp ranges and won't under other temp ranges. Then again Ford ignition modules (for spark control) are very sensitive to heat when their damaged. I recommend leaving at a trusted shop overnight so they can check everything over with it "cold out" and then again later when it's "hot out" Good luck