A small nylon bushing in the cruise control servo bail may slip out of place, causing intermittent and unexpected increases in engine speed or dieseling (engine run on with ignition off).
Acceleration & cruise control
Buick Riviera Acceleration problems by year
10 complaints filed with NHTSA about the Buick Riviera's acceleration & cruise control. Unintended acceleration, surging, throttle problems and cruise or adaptive cruise faults.
Acceleration complaints by model year
Acceleration recalls
Latest Riviera acceleration complaints
Tl*the contact owns a 1998 buick riviera. While driving 40 mph, the vehicle continued to accelerate and would not stop when the contact depressed the brake pedal with both feet. He drove on the shoulder and had to place the vehicle in neutral for it to stop. The contact opened the hood noticed that the plastic shield separated that covers the motor. He was able to tape the shield back and drove the vehicle to his residence. The dealer stated that the supercharger waste gate valve separated and needed to be...
Read the full complaint
repaired. The manufacturer advised him to get an evaluation from the dealer. The dealer decided to reduce the labor cost to $223.43. The current mileage was 57,728 and failure mileage was 57,617. Updated 12/12/07
Driver's side air bag deflated due to an electrical short. In addition, horn failed and cruise control malfunctioned. *Ak
While driving 70 mph with the cruise control engaged, gas pedal descended to the floor, causing the vehicle to surge to 120 mph. When attempting to brake vehicle vibrated violently which burned the brake pads. Vehicle continued to drive at 120 mph for half a mile before driver was able to shut off the engine. *Ak
While at a complete stop vehicle will surge forward. Dealer has been notified. Problem has reoccurred. Dealer unable to solve problem.*Ak
While driving vehicle will start to accelerate, and then decelerate. Other times vehicle will stall out. Contacted dealer ,and the dealer cannot find the cause. *Ak
While driving vehicle will decelerate and will not increase speed when pressing the accelerator pedal. Cause unknown. Please provide details. *Ak
Intermittently when vehicle accelerates from a complete stop the the engine revs, but the vehicle will not move. The dealer has been notified. *Ak
Engine did not deaccelerate after releasing accelerator pedal, instead, accelerated high speed, driver kept brakes applied to avoid high speed, no warning, two occurrances within 10 days, cause unknown.
Owner states while driving at 55-60 mph when the throttle is steady the vehicle has a power surge which causes the vehicle to lunge forward, dealers found no problem when dianostic test was ran. *Ak
Cruise control activated vehicle surged at high rate of speed. Tt
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data