My car keeps dieing in the hot months but not when it's cold outside

What is your question?

It started 3 year's ago I've had 4 different mechanics to look at it and they hooked it up to their diagnostic systems and found nothing I've changed the 02 system , the Throttle body, motor Mont and nothing has changed over the years and it keeps getting worse ,it doesn't over heat or run hot it just starts to chug and all the lights will blink like a Christmas tree and then it will die and I don't know what else to do with it but I love my car and I don't want to get rid of it but I don't want to keep breaking down and keep putting money into it and it still doesn't fix it

What makes this problem better or worse?

It's worse in the hot summer but no problem in the winter weather

How long has your 2007 Ford Freestyle had this problem?

Going on 3 years