Hi thanks in advance for your time my ranger a 4.0 has a very disterbing peredoic starting problem.either it will start rite up or it will not,when it will not i dont think fuel pump is engageing (it was recently replaced for this reason) some one told me perhaps a bad wire as some wireing harneses from mexico was bad ? how to check ,and is there a reacuring problem with these vehicals? thanks BT