The other day, upon arriving home, my 1989 K5 Silverado Blazer started to "sputter". I wasn't getting full power from my throttle when I accelerated, but it was very sparatic and the problem seemed to go away. However, the next day my vehicle won't start. If I spray starter fluid directly into the carb, it will start briefly, but stall as soon as it burns through the small amount of started fluid. This leads me to believe that I have fuel delivery problem. I have purchased a new filter, and have not installed it yet due to reluctance to mess with the slightly corroded fuel line. I know it may be the pump, but it's in the tank and I don't want to drain/remove it if I don't have to. Any suggestions? Thanks in advance for your help.