2007 Chevrolet Impala: hesitation when accelerating

Filed Jul 24, 2019 · Driver assistance, Transmission · 154,000 miles · IN

Transmission tends to long shift at 1st and 2nd gears causing erratic shifting uphill and sometimes turns. Unsafe! Jasper engines and transmissions did update for clutch plates and pressure solenoid for this is known to be a problem. Hesitated acceleration whim going uphill. First trans was installed in 2016 october

Filed Nov 13, 2018 · Transmission · 149,000 miles · WI

When taking of from a complete stop the vehicle hesitates to accelerate and starts to jerks and jumps. And shifts hard.feels like somone just rearended you.happens all the time whether on a city street or merging onto a highway and also while turning .

Filed Jun 28, 2017 · Acceleration, Driver assistance · KS

My issue started with my car turning over. It would not want to start first try but would turn over on the second. Some times it would start fine and others it hesitated. After dealing with this for a while my battery died after spending a little while idling. Took it to check the accelerator and the battery but both were fine. Continuing to intermittently act up when starting, it also started to show other problems. I was getting in my car to leave and it started up fine but before I could pull out of my drive way my car started shaking and showing an "engine power is reduced" message. I turned it off ran inside and when I came back out to show others the issue it started without a problem and did not have the message any more. Still have the turnover hesitation, I continue to drive it however it started to shake and show the same engine power reduced message as I pulled into my apartment complex. Also has done this when leaving and turning into a main road, causing us to pull over and wait to start it again. Took it to get codes tested again and it pulled up a didn't match code. After doing research tons of others had the same problem and worse. Many showed the solution to be replacing the throttle body and throttle position sensor which we did. Slight hesitation on the start up but took it around the block no issues. Went to test it on the highway and before we even made it the engine power reduced came on and car shook again. There and so many others that have had this problem and many have not found the fix. Extremely disappointing since we cannot return the part after it's been installed. I am worried to take my car out and drive it on the highway because I do not want this to happen while I'm at increased speeds.

Filed Apr 25, 2016 · 10,000 miles · GA

Currently car has 140,000 miles. 1. Car hesitates and stalls into gear. It accelerates slowly and jerk and jerks and jolts into traffic constantly. Started around at 130,000 miles. 2. Every time I turn on the heat from the air conditioner and vice versa, it makes a loud clicking and clacking sound that lasts for about a minute and it is loud enough to be heard outside the car. Started around 10,000 miles. 3. Was driving down the road when the dash starts chiming and displaying the oil pressure is low and to stop the engine. I stopped and checked the oil and it looked fine. This is ongoing and is frustrating. Started around 125,000 miles. 4. I am beginning to notice that all of the above defects occur once my car reaches a certain mile.

Filed Dec 22, 2015 · 15 miles · NC

Car hesitates and stalls into gear when turning into intersection or after stoping. In accelerates slowly and jerks into traffic.

Filed Nov 19, 2014 · Electrical · 190,000 miles · MO

Tl* the contact owns a 2007 chevrolet impala. The contact stated that the doors hesitated to unlock and lock. The contact also stated that the vehicle stalled and the traction control warning light illuminated. In addition, the vehicle accelerated and the cruise control activated independently. The contact stated that the failures occurred after the vehicle was serviced under the federal safety agency campaign number: 14v355000 (electrical system). The vehicle was taken back to the dealer who stated that the failures were not related to the recall. The cause of the failure was unable to be determined. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 190,000.

Filed Jun 14, 2014 · Electrical, Engine · 151,450 miles · IL

While driving car started to jerk and hesitate the check engine light came on along with a message of reduced engine power. Could not drive the drive over 5 MPH. Was able to get to the side of the road. Had to push the car into a parking lot as the engine will no longer start but cranks over fine. Had to buy a scanner to read the code because the car was not able to drive to a auto repair shop or auto parts store to read the codes. The po641 code was set. Checked and tested the sensor wires for the 5volts every one that I tested showed ok. Replaced the gas pedal assemble because of the code that could be a source of the problem no difference. Cleaned the throttle body unit no change car will not start.checked and gave all the wires a good pull and or tug to wiggle the connectors and took apart all sensor connections no corrosion was found.all grounds appear to be good. No broken wires are found no blown fuses were found.after 2 days was able to start engine with the message reduced engine power and car died again and would restart but not idle. Was able to rev engine and keep it running but once it idled it would die and sometimes not restart again.at this time car is unsafe to operate on any roadway because it might die and random times.

Filed Nov 11, 2013 · Transmission · 112,564 miles · MI

2007 impala ss. Transmission hesitation occurs when going around 45-60 MPH. Car semi-engages shifting, but then backs out, giving a chugging sensation while driving in that speed range. Higher speeds above 60 produces an incredible screech/whine noise. Currently in shop for transmission diagnostics. At 74,000 miles clutch was replaced due to it being cracked in half. Gm has either mad poor transmission engineering, using shotty parts, or this transmission is overly underrated for the power of the engine.

Filed Aug 17, 2013 · Engine, Fuel system · 89,000 miles · MS

First, when I slow down to turn a corner, I take my foot off the gas. After the turn, when I press the gas I have no power. It doesn't die, it just won't go anywhere for about 15-20 seconds, no power. That doesn't sound like a long time unless you are sitting in the middle of a busy intersection. I have to come to a complete stop for about 20-30 seconds, then take off. Sometimes it goes, but feels like it jerks into gear. That's ok at stop signs but stop lights that turn green as I approach can be dangerous. Also, if I turn a corner onto another street, it hesitates. And sometimes I have almost been hit from behind. People expect you to turn and proceed. When you just stop, they may not. I also noticed one day, when I just coast on a level road, my car sometimes accelerates for quite a while, instead of slowing down immediately. I once took my foot off the gas at 45 MPH and coasted on flat road for 2.5 miles. The latest related problem is.. Spring 2013, twice, I turned a corner and it just died. I had to pull over to the side of the road to get out of traffic. After a few minutes, it cranked back up. Thankfully, I was on a city street and not a four lane road. I also have problems with parking. I put my foot on the brakes and pull into parking spot. When I put it in park, it lunges forward. Or if I stop in traffic, sometimes it lunges after it stops. I have to make sure that I leave plenty of room in front for this problem. I think it has something to do with the computer allowing the gas to flow or stop. I had the transmission rebuilt and it still does it.

Filed Oct 26, 2012 · Electrical, Engine · MO

Since I have had my impala I have had several problems with the ca. The first problem that I noticed was that my windshield wiper fluid stop coming out after on having the car a few months, I later found out that the motor had gone out. Another problem that im having is that the check tire service light continues to come on even after, tires have been filled and replaced, I have also noticed that on occasions many of the other service lights come on like check airbags, and brakes even after car has been serviced. My biggest issue is that my transmission fluid has begun to leak out my car and no one not even the dealership can figure out where or why its leaking. This causes the car to hesitate and jerk upon acceleration. Reading a lot of the forums out I'm not the only person having these problems and I think that an investigation should be done on the impala.

Filed Oct 19, 2012 · Transmission · 37,000 miles · GA

Tl* the contact owns a 2007 chevrolet impala. The contact stated that the engine rpms suddenly increased as the vehicle failed to respond to acceleration attempts. In addition, the transmission hesitated to engage in gear but once it did, it would shift hard. The vehicle was taken to the dealer who diagnosed that the tcc valve was leaking, causing transmission fluid to leak out of the torque converter. As a result, the transmission had to be rebuilt. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was 37,000 and the current mileage was 39,000.

Filed Sep 19, 2011 · Brakes · IN

I noticed that all of a sudden when I would try to stop my car would shake or hesitate to stop. I thought it was my brakes. After trying to park and the brakes not stopping at all. I took the car to repair shop to be fixed. First I was told it was the master cylinder after replacing that the car still would not stop. So I was told it was the hydraulic ABS system and that all the brakes and rotors needed to be replaced. The dealership doesn't have the part it is on backorder due to the high volume of the part. That says to me there is a problem that chevy needs to be responsible for and correct before a serious accident happens.