1993 LeSaber with stage II motor has tendency to miss or hesitatae during full throttle acceleration. Seems to only occur on hot days and while traveling at around 60 miles per hour, and then going to full throttle. Outside temperaures would normally be around 90+ All Buick dealearships that have tried to figure this out have failed because the problem doesn't always occur during testing. Any suggestions?
Chris (A BAD SIX)