2003 Chevrolet Impala acceleration problems

Filed Jan 19, 2023 · Acceleration, Driver assistance · LA

Accelator keeps getting stuck at traffic lights and while driving

Filed Oct 13, 2021 · Acceleration · CA

Traveling at 58 mph in Cruise Control for 10 minutes I increased speed with 4-6 rapid pushes of the Accelerate button in less than 1.5 seconds, Each push is 1 mph. I have never pushed it that rapidly.The engine acted as if I floored the accelerator & the transmission went from 4th to 3rd gear, speed went to 70+ and rapidly increasing. I stepped on the break pedal several times to disable CC but no help, I switched the CC button to the off position several times, no help. Now at 85+ and accelerating hard in wide open throttle (WOT). I shift to Neutral and turned the ignition to the ACC position to retain steering ability as the engine was RPM'ing out to destruction. I coasted off the highway and set ignition to off. After a few minutes I turned engine on and it rev'd out of control, still WOT. Ignition off did not reset the problem. I opened the hood to disconnected the battery & I observe that neither the CC or accelerator cables are not holding the throttle body (TB) in "WOT", it was closed in an idle position. It is not mechanical. I disconnected the battery for several minutes and then the system operated normally. I have used CC a million times but never have pushed that accel button that fast. I served 7 years as a Reactor Operation onboard US navy Fast attack Submarines, have torn apart and assemble mechanical and electrical reactor systems. I have been a Hardware Engineer for 40+ yrs and have 10 US patents in fault tolerant server design. I've been a car guy since 5 yrs old. This is a problem with the cars computer or its code. The rapid pushing of the CC accel button is key here as well as memory retaining this CC state after Key OFF. Its a good thing I experienced with many hard casualty life and death situations while serving, because my car was accelerating out of control, my experience and training in the US Military taught me to keep cool and think.You really should investigate this. I can tell you more specifics but I'm character limited.

Filed Mar 6, 2018 · Acceleration, Driver assistance · IA

'takata recall' no acceleration after 2rpm

Filed Nov 14, 2016 · Acceleration, Brakes · 150,000 miles · AL

Abs, traction, and break lights come on........ Then when I push on the gas paddle its often like the brakes want to lock up , with a scrubbing sound.... Also when I push the break paddle down it often makes a sound and the break paddle feels like it comes back up with the break still down,.........but then when I drive like 20-25 miles the lights go off and hardly come on until I stop again

Filed Sep 17, 2016 · Acceleration, Electrical · FL

When I am driving down any road, stopped and turning the ABS system engages causing grinding noise. Loss of power and periodically brakes lock up and gas pedal locks. When pulling off from a stop I can not accelerate & RPM goes almost red line, car starts to jerk and and transmission doesn't shift. I have to let off gas pedal and allow to shift. It has stalled numorus times when pulling into traffic and almost caused me to be hit. The service traction control/ABS warning light dings and stays lit. I manually turn off ABS but problem still occurs. Also the wiring thru out the car has failed to my rearview mirror, domelights and radio panel. My gas mileage has significantly decreased. The problem started around the beginning of the year and has progressively gotten worse to the point I and scared to drive my car.

Filed Feb 23, 2016 · Acceleration · 120,000 miles · IN

Whilst driving down the roadway the throttle body became stuck in the open position causing the vehicle to increase speed without the driver being in control of the vehicle which could result in a serious accident with other vehicles on the roadway

Filed Dec 17, 2015 · Acceleration, Lights · OH

Tl* the contact owns a 2003 chevrolet impala. The contact stated that the cruise control activated independently, the headlights and brake lights flickered, and the instrument panel warning lights illuminated intermittently. The contact mentioned that the heater had to be running for the cruise control to deactivate. In addition, the exterior lighting flickered when the engine was not running. The vehicle was taken to a dealer where the failures were undetermined. The vehicle was not repaired. The manufacturer was notified of the failures. The failure mileage was unknown.

Filed Nov 18, 2015 · Acceleration, Brakes · 139,000 miles · OR

Tl* the contact owns a 2003 chevrolet impala. The contact stated the vehicle increased speed violently once the brake pedal was released. The accelerator pedal was not depressed. The contact pulled over, shut the ignition off and restarted the vehicle, but the failure persisted. The failure recurred numerous times. The contact was a mechanic and stated that the throttle position sensor needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 139,000. Updated 1/12/16

Filed Aug 1, 2015 · Acceleration, Electrical · 97,673 miles · PA · crash

Defective ignition switch caused cruise control to malfunction.

Filed Feb 22, 2015 · Acceleration, Airbags · 197,000 miles · OK · crash · 1 injury

I was traveling on a 2 lane road. A truck pulling an enclosed trailer was in front of me turned on his right blinker and began to brake to make the turn. I was traveling 77 MPH, so I moved to the oncoming traffic lane (the left lane) in order to pass the truck. At the last second the truck swerved into the left lane in order to make a wide turn. I abruptly jerked the steering wheel right to avoid collision with the truck, but the vehicle seemed to lose power steering as well as power brakes. I was unable to straighten the steering wheel back after jerking it to the right to go back into the right lane; my vehicle hit the back of the enclosed trailer and then hit steep ditch where my back passenger tire popped and the vehicle flipped onto its roof. The vehicles airbags failed to deploy even though the vehicle has significant damage to the front , top and sides of it. I regained conscientiousness I attempted to turn the car off and remove the keys from the ignition. But I realized that the keys were not I n the ignition.I crawled out of the passenger window to exit the vehicle. The keys were later found by my husband loose in the vehicle. I hit my head hard when the vehicle flipped, good deal of blood on me from what ended up being multiple superficial lacerations as well as a deep wound in my left knee, which required 12 stitches to close up. I will have a scar from it for the rest of my life. I was rushed by ambulance to the hospital and was released around 9 pm. 2 days later we received the ignition switch recall notice in the mail gm refuses to answer any of our questions regarding this wreck. Gm did retrieve the black box info from the vehicle., they refuse to provide us with any explanation to why the airbags failed to deploy or why there seemed to be a malfunction within the car which LED to the accident.