My 1998 Blazer, which only has 60k miles, has died without warning twice on the highway at speeds higher than 40 mph. It restarted without problems each time, but this type of problem at high speeds is very worrisome. Other than this random dying, my Blazer does not seem to have any problems and rides smoothly. After the first event, my mechanic changed the fuel filter and now thinks that I will need to change the fuel pump to prevent further problems. Since I cannot afford to make any other repairs if I get a new fuel pump, I am concerned that this may not really be the problem. I am particularly worried that it could be an electrical problem or need new spark plugs and wires. Does this situation sound like a fuel pump problem? Is there any easy way to rule out other electrical possibilities? If it is the fuel pump, but I do not get a new one, can I expect any problems more serious than having the engine die at high speeds but restart immediately?
Thanks.