I took my 2004 explorer xlt (56,000 miles, no other problems) The "service engine soon" light came on The idiots at the ford dealership said they don't know whats wrong with my suv! Possible things: my computer chip is not working right or my fuel pump is going? Don't they just hook up the suv to a diagnostics thingy? I'm a girl so I have no clue about this stuff! I have only done oil changes every 3 months, and changed the air filter. Otherwise, the suv has had no other service. Does anyone have any suggestions as what should be done or what the problem could be? Thanks!