why does my engine sputter and stalls when the temperature goes to 205F to 210F?

What is your question?

The cooling fans are working fine and the car runs fine until it reaches temperature range of 205 - 210 then it sputters and stalls on feeding gas. It does restart and problem continues until cooling temperature is below 205F. The car has 92,000 miles on it.

What makes this problem better or worse?

Only happens in the summer when the outside temp.is in the 80's and above and engine temp reaches 205 and above.

How long has your 1997 Buick Park Avenue had this problem?

summer past 2 years