I've got a '95 that just started doing the same thing this week.. haven't had a chance to get to autozone to get the codes out of the computer yet.. but I'm interested in hearing what the verdict is as well... may give some insight as to whats up with my truck.
only other additional thing is that mine engines been fluctuating between running normal temp and -hot- (enough to light up the check gauges light).. i replaced the thermostat about a month and a half ago.. and symptom dissappeared.. but it has slowly started creeping up into the orange zone again
-vballfun