My 92 SVX has a new quirk. WHen I first start it up in the morning, it will hesitate on my first acceleration onto the highway upto about 3K RPM. After that it is fine. If I let the car sit and idle for about 1-2 minutes, it will not hesitate. Any thoughts.

I use premium fuel from Sunoco
My oxygen sensors and fuel filter are less than 6 months old.
I use redline fuel injector cleaner every other oil change.
The svx has 138000 miles.

Thanks