7.1% of complaints about the 1998 Buick Lesabre came in the first year, which is unremarkable for a 1998 vehicle — around the middle of the 180 model-years on record. The median complaint arrives at 5.7 yr in service. The most-reported system is engine cooling (188 complaints), typically at 5.8 yr or about 67,996 miles.
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH 3800 V6 (L36) ENGINES AND CERTAIN DELPHI FUEL PRESSURE REGULATORS, THE REGULATORS HAVE A MUCH HIGHER THAN USUAL RATE OF FUEL LEAKS. A LEAK CAN ALLOW FUEL TO ENTER THE INTAKE MANIFOLD THROUGH A VACUUM LINE. IF THE ENGINE DOES NOT START WHEN CRANKED, THE FUEL FROM THE LEAKING REGULATOR AND A MISTIMED SPARK CAN CAUSE A BACKFIRE.
THE BACKFIRE CAN RUPTURE THE INTAKE MANIFOLD. THE RUPTURE OF THE INTAKE MANIFOLD CAN DISPLACE A FUEL LINE, PULLING AN INJECTOR OUT OF PLACE, AND CAUSING A FUEL LEAK AND POSSIBLE FIRE.
WHILE DRIVING THE VEHICLE AT ANY SPEED THE ENGINE DIES. THE VEHICLE HAS BEEN TO THE DEALER 3 TIMES FOR THIS PROLBEM. THE MANUFACTURER IS AWARE OF THE PROBLEM, AND A SERVICE BULLETIN HAS BEEN ISSUED. *AK
ENGINE FAILED CAUSING STALLING IN TRAFFIC, NOT ABLE TO DETERMINE WHY INCIDENT OCCURRED.
CONTINUOUS PROBLEM WITH ENGINE HESITATING TO ACCELERATE FROM A STOPPED POSITION, ALMOST RESULTED IN AN ACCIDENT. (QCAW)
WHEN DRIVING THE VEHICLE AND TRYING TO USE THE HORN, THE HORN DIDN'T MAKE ANY SOUND. CONSUMER CONSIDERED THIS TO BE A SAFETY DEFECT. THE DEALER REPLACED PARTS OF THE AIR BAG. THE CONSUMER VEHICLE HAD BEEN IN THE SHOP SIX TIMES AND THEY CAN'T DETERMINE THE PROBLEM. *AK