NHTSA Complaint #10324301 — 2001 CADILLAC SEVILLE

FUEL/IGN STARTING PROBLEMS ________________________________________ I HAVE A 2001 CADILLAC SEVILLE SLS THAT HAS BEEN HAVING INTERMITTENT STARTING PROBLEMS. PRESENTLY THE VEHICLE WILL NOT BUILD-UP FUEL PRESSURE IN ORDER TO START TO 41-47 PSI UNLESS I REMOVE THE REAR FUSE/RELAY BOX IGN 1 MICRO RELAY. WITH THIS RELAY REMOVED, I CAN HEAR THE FUEL PUMP BUILD-UP THE REQUIRED PSI AND THEN I CONFIRM THE BUILD-UP OF THAT PSI BY LOOKING AT MY TEST FUEL PSI GAUGE UNDER THE HOOD, THE CAR THEN STARTS NO PROBLEM, AND RUNS NO PROBLEM WITH RELAY NOT INSTALLED. WHENEVER I RE-INSTALL THIS MICRO RELAY THE FUEL SYS WILL NOT BUILD-UP THE REQUIRED PSI, IT JUST STAYS AT 0 PSI, AND OF COURSE IT WILL NOT START. I JUST REPLACED THE FUEL PUMP SENDING UNIT ASSY PLUS FUEL FILTER TODAY. THE OTHER DAY I WAS DRIVING ON HIGHWAY 25 SOUTHBOUND AND DOING 75 MPH AND THE ENGINE JUST DIED, QUIT RUNNING AND WOULD NOT RE-START. I HAD MY VEHICLE TOWED HOME, THE NEXT DAY I WENT TO TROUBLESHOOT MY CADILLAC AND THE VEHICLE STARTED RIGHT UP WITH THE IGN 1 RELAY REMOVED. AS I MENTIONED EARLIER I ALREADY REPLACED THE FUEL PUMP ASSY THINKING IT WOULD FIX PROBLEM AND IT DID NOT! TODAY WHILE DRIVING 55 MPH THE ENGINE SUDDENLY QUIT RUNNING AGAIN AND I HEARD A NOISE FROM THE FRONT END AND THE CAR SHOOK ALSO. I HAD TO FIND SOME SHOULDER ROOM, PULLED OVER, REMOVED IGN1 RELAY AGAIN AND THE CAR RE-STARTED NO PROBLEM AND I CONTINUED ON DRIVING TO WORK. *TR