Impala - Chevrolet :: 2007- Electronic Throttle - Lag Between Acceleration On The Gas Pedal And Response From The Car
Jun 12, 2013
My 2007 Chevy Impala with the 6-cyl engine is, overall, a nice car. One thing I just do not like about it, though, is the electronic throttle. There is a quite annoying lag between acceleration on the gas pedal and response from the car It isn't just my car, all the Impalas and other cars I test drove when shopping for the car are the same way. Even the 2007 Buick with the last year of the 3.8 L engine had a touch of lag time compared to the 1987 Olds Cierra I had with its 3.8 L engine and mechanical throttle. I'm no lead foot but when I want acceleration I want it now and not later. Guess I got spoiled from 20 years driving the '87 with its giddy up and go.
When making left turns without a traffic light, I have to allow a much wider open slot in oncoming traffic than I ever did since driving the 1973 Toyota Corolla with its four weak hamsters under the hood. I'm not the only person I've heard gripe about electronic throttle. I have to wonder what about drive by wire is superior to mechanical throttle if it slows down the throttle response so noticably???
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My 2007 Chevy Impala has developed a brand new problem today. Driving down the block to the store, the speedometer started fluctuating wildly. I was going a consistent speed of about 10 mph in my parking lot and when I braked to a stop the speedometer started swinging all over the place, from 10 to 35 mph. It then gave me a message on the dash saying "Speed Limited to 107 MPH" and somehow killed my accelerator because the gas pedal no longer did anything. I restarted the car and the accelerator worked again for a bit and then pulled the same problem again. The speedometer is now fluctuating wildly the entire time I drive, including while stopped, but so far the message seems to have kicked on and disabled my accelerator only when slowing to a stop and accelerating out of a stop (it happened three times).
I know that the Impala's governor is set to 107 mph so I can guess why that message exists, but I wouldn't think a governor would actually kill the car even if it kicked in at the right speed.
It wasn't that long ago that we had to have our pedal position sensor resynchronized and the mechanic had mentioned that it was possible the sensor was going bad, but I don't think that would be the problem here as it seems like the car would actually have been accelerating sporadically, whereas in my case just the speedometer is swinging around despite an even speed.
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On Saturday August 9th 2014 we were sitting at a stoplight when the engine on our 2008 Nissan Frontier suddenly accelerated to red line. I held on the brakes and the tires began to smoke. It finally occurred to me to turn off the key. That stopped the engine. I restarted the engine and we took the truck to the nearest Nissan dealer and told them about the problem and left the truck with them. The service manager said that he had never heard of this problem on a Nissan. Today, Monday August 11th we contacted the dealer and we were told that they couldn't duplicate the problem and there was nothing they could do. The truck is on extended warranty and they still don't want to deal with the problem. It seems obvious to us that the accelerator system should be replaced.
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First ever failure with a Toyota. We limped home at 25mph this morning. No response with throttle pedal input, but the throttle body did operate in fail safe mode. Throttle pedal checks out with omhs check across the terminals per Toyota manual. I'm looking at having the car transported 45 miles to nearest dealer. I can change the tb out myself but not sure of the electronics. Does the computer have to be programed for a new tb?
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When the engine is cold, and up to about half way to 190 degrees on the temp gauge, the throttle seems to not want to open very far. Almost like there is a disconnect between your foot and the throttle. You get a little acceleration but no where as much as when the engine has warmed up. I have noticed this when the outside air temp is below 25 f or so. Is this some goofy emissions or "save the motor until its warm" thing?
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Today when driving my 2003 Camry(148,000miles), I lost all throttle response. Car was driving normal, I stopped at stop sign, tried to go and got NO response when applying the gas pedal. car will idle fine at about 1000 RPM's. When pushing gas pedal car does nothing.
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Is it possible bad spark plugs and wires affect poor acceleration and bad throttle response.I have no error codes and the engine is rebuilded.Idling sound good.Difficult to start engine first time(seconds after-easy to run the engine).
Tyre size 195/65/15 winter?
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I purchased a 2014 3.6 SEL from a non VW dealer. They may have put regular gas in the car, I feel like it runs weird, feel a delayed throttle response and a little stutter before acceleration? or is it just me?
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I've got an '04 VW Golf that has recently taken to occasional bouts of no throttle response from the accelerator pedal. This has happened a handful of times during the past few months and until this morning occured only while driving on the highway at a constant rate of speed (~58-60mph). What happens is the engine will start to decelerate as though I've taken my foot off the gas but my foot hasn't moved off of the accelerator. The car's a manual transmission and for no good reason I usually shift into 4th gear (out of 5th) slap down the accelerator pedal a couple time to rev the engine while the cluth is depressed between gears and the accelerator will wake up and I'll get throttle response again and all's well. This morning it happened twice on the highway and once in first gear starting from a stop at an intersection. I'm worried I may not make it home... This is Minnesota and it's very cold -- could it have something to do with the temperature?
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2009 Limited, 3.3L, 65000 miles.
Car starts, check engine light and ESC light come on. The car has no throttle/pedal response. It will not go above idle speed and it doesn't matter how much the fuel pedal is pressed. So we've turned around and returned to where we started.
The first time I let the car sit for five minutes and started it. No problems for four weeks. Yesterday, we tried that four times and that didn't work. I disconnected the battery for five minutes and the car works normally again.
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My 2000 Chevrolet Impala doesn't want to start unless I tap on the throttle under the hood--battery seems okay, as the heater, radio, lights work, but starter won't even click unless I do this. Know why?
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I own a 2000 F250 7.3 Powerstroke 4x4. The only aftermarket engine modification I have is a Tymar intake. The problem I'm having started about 6 months ago in a very erratic fashion. I would pull up to a traffic signal and as the light changed to green, without warning the truck would have no throttle response. The engine was running fine; there was just no response as I stepped on the accelerator pedal. Usually when I put the transmission in neutral, revved the engine a few times, the throttle would come back on line. This happened 4 or 5 times over the summer and then went away completely until today. Today it came back with a vengeance. At one point I had to shut the engine down completely to restore throttle response. It's a bit unnerving when it happens in the middle of a busy intersection. I was told that it may be the throttle position sensor. Does this sound correct and does it need to be replaced?
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I have a 2007 Chevy Impala with the 3.9L. It has just over 110,000 miles on it. I've owned the car for about 5.5 years. Back in 2012, I took the car to a local transmission shop. Here's the reason: Let's say the car has sat overnight. I start it up (regardless of the season) and go to the stop sign at the end of my street. When I go to accelerate, there will be a very short lapse and the car will seem to jerk into gear then go. This is a very intermittent problem and does not happen every day. The car will do this for a bit when accelerating from a dead stop and then the problem goes away.
The trans shop said the transmission needed to be rebuilt. Guy told me they've seen problems with the Impala transmissions and, if I remember correctly, that the parts used inside aren't the best. Looking for a second opinion, I took the car to a Chevy dealer. The dealer was not able to experience the jerking. I had the trans service done (80,000 miles at the time). The problem persists to this day and has not, noticeably gotten worse. I decided to take the car to another dealer last week. Same thing: the dealer could not create the jerking issue. Again, this issue is very intermittent.
I am not sure what to think or do at this point. I called a couple shops around town and have gotten the following advice/information:
1) Bring it in and we can see if we can recreate it, but can't guarantee it.
2) The transmission needs to be rebuilt (this without even looking at the car).
3) Wait for the problem to get worse so that it CAN be diagnosed properly.
One guy said he didn't trust the dealer mechanics, that they "just drive around the block once." I am not sure what to do?
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I have a 1965 Chevrolet with the original 396 engine. When I purchased the car, I noticed the fuel pump was wet with fuel at the weep holes. I replaced the pump with a new one. This pump also leaked at the weep holes. I thought dirt may have been in the fuel tank and the check valves were stuck causing the leak. I installed a glass inline fuel filter before the fuel pump and installed another new pump. There is no dirt in the filter. This pump also is leaking from the weep holes. The pump only leaks when I give it full throttle and bring the car up well over 65 mph. I would like to retain the stock type of fuel pump. I'm wondering if the pump push rod is a replacement at some time and too long.
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Driving on the motorway yesterday, all fine until i lost power..engine light came on, but I was able to continue driving for about 6 miles (trying to get to services) but eventually it would go no further, pulled over and found that the intercooler pipe had come off, replaced it but still no joy.
Recovery van attended and plugged in diagnostic and found a dpf fault and gas pressure valve fault, he cleared the light but i think the faults still remained.. so i had to be recovered home.
The engine will start but it does not quiet sound right, no response from the throttle and if i put it into drive the engine stops.. Its a 2007 2.2
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I have a 2003 impala I just bought and it has an intermittent problem. Sometimes when I step on the gas the motor will 'slam'---kinda like if the motor mounts were bad but they look good and it doesn't always do this. Also, if I hit the gas pedal hard and then almost as quickly let off the gas pedal I get the same effect--shutter/slam. I suspect the mounts but they look fine. If I keep on the gas all gears shift very smoothly. Gear shift is smooth thru all gears if I floor it or go slowly accelerate so it seems not to be the transmission either.
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2007 F350 6.0L 230,000 miles
Yesterday, while driving home from a weekend out of town trip, all of sudden lost throttle control. Just went to idle while at cruise speeds, could pump pedal and no response. Then got pedal control back and seemed to run normally.
This happened several times. Hubby suggested moving the adjustable pedal which I did slightly. Although I was not using the cruise control, we had a sense that maybe it was engaging??? So I hit the off button a couple of times. After these two interventions, drove the last 80 miles home with no further incidents.
Today, we checked codes and had a PO231, Fuel Pump Secondary Circuit Low. I don't think that is our problem with above based on research, but we will look into fixing that too. We are thinking TPS or a position sensor on the accelerator pedal. We could replace those easily ourselves.
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When I press on gas petal the car hesitates and seems like it is having trouble accelerating. It also does this when I accelerate up a hill actually it is worse. The mechanic changed by spark plugs and coil pack and it is still doing it. What could be the problem.
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My husband checked my oil and the dipstick was bone dry. I took it to the dealership; they immediately gave me a loaner car, and fortunately I still have 2 months left on the GM engine/power train warranty. The last oil change was only 4,000 miles ago. My questions: Why didn't any warning lights go on? Why does the indicator show that there is 32% oil remaining? Where did the oil go? The dealership is open only for 1/2 day (Saturday) and I may not get an answer from them until Monday.
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I have a 2000 Impala with 215000 miles and it keeps on running. It has developed a side-to-side shutter and only happens during accelleration. It smooths out once I stop accellerating. I have had a left rear wheel bearing replaced hoping this would solve it. Not so much. It feels like it is coming from the rear of the car. There is no movement in the steering wheel. Could this be motor mounts?
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The wife's '07 Chevy Impala's wheel is making a funny noise - sort of a "whoop whoop whoop" out of the front passenger side wheel as the car gets up to speed. there is vibration in the steering wheel also. When coming off a local highway down a hill, she had to hit the brakes semi-hard and there was a great vibration from the brakes.
I have already rotated the tires in case it was a tire/wheel issue, and took to mechanic to replace the bearing - and it seems to have gotten worse. The mechanic said the back bearing looked good but he still wanted to replace... which wont happen. recently had a control arm replaced by same mechanic in front but don't remember which side.
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