reposting newbe to xterra my daughters 2000 xterra,s tach starts to jump around between 2000 abd 2500 RPM,s. I have replaced the plugs,fuel filter,roto cap and roto bug and it is still doing the same. I have read on line about the distributor going out. at first thought it was the fuel pump but my experance is the fuel pump just goes out. I need help with my daughter apprx 2-3 hours away from home in college cant afford to have a lot of trouble. should I replace the fuel pump or the distributor ther is a loose of power also