Acceleration Hesitation

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Norcal_Mike

New member
I have a 2010 SR5 that has a pronounced hesitation when driving around town. It seems more pronunced after slowing down from say, 45mph and applying the break down to about 10mph and then re-accelerating. There is an annoying lag in the engine response. I can feel the accelerator go down but it takes a second for the engine to come to life. All other engine/tranny performance seems normal.

Has anyone else had this problem? It is subtle, but annoying after driving around town all day.

P.S. I am very happwy with all other aspects of the 4Runner (except for the rediculous iPod menu interface controls :D

Thanks for your input.
 
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Norcal_Mike said:
I have a 2010 SR5 that has a pronounced hesitation when driving around town. It seems more pronunced after slowing down from say, 45mph and applying the break down to about 10mph and then re-accelerating. There is an annoying lag in the engine response. I can feel the accelerator go down but it takes a second for the engine to come to life. All other engine/tranny performance seems normal.

Has anyone else had this problem? It is subtle, but annoying after driving around town all day.

P.S. I am very happwy with all other aspects of the 4Runner (except for the rediculous iPod menu interface controls :D

Thanks for your input.
Click to expand...


Not a problem with my T4R Limited! However, I did have this problem with my VW Touareg V6 and it was annoying. It improved some after it was reflashed.
 
Its called drive by wire.

Unfortunately car companies have decided to use a computer module instead of a mechanical mechanism from the pedal to the motor to regulate the throttle response. So just like your computer at home it takes a second for it to process what you want and respond accordingly. If you look get down and look at your pedals you will see your gas pedal with a wire harness hooked up to it. Its all computers now.
 
Thank you for your replies...

The "drive by wire" is supposed to be an improvement?? If that is the issue, then everyone would be expierencing similar issues. Maybe I am just hypersensitve, but I really noticed it when I was a passenger for the first time. I am coming from a Ford Ranger which is very low tech, but direct.

It feels like those modified torque converters in old muscle cars that dont engage until a higher RPM. Pretty annoying and borderline dangerous in slippery conditions.

Oh, and by the way... what does "reflashed" mean.
 
No issues here on my Limited also. Wonder if disconnecting and reconnecting the battery to reset the ECU will make a difference?
 
Norcal_Mike said:
Thank you for your replies...
what does "reflashed" mean.
Click to expand...

"Flash" could mean an eraseable programable memory. Me, flashes cellphone software to correct "hanging" it means i will rewrite the system version software of a cellphone or upgrade to a version with known flaws corrected.

Same idea could apply to car ECU's. The dealer can flash your car's computer. But I will try disconnecting the battery first for minutes to allow the ECU to reboot and reset it might correct your hesitation problem supporting their ideas above about computer controlled...
 
Norcal_Mike said:
I have a 2010 SR5 that has a pronounced hesitation when driving around town. It seems more pronunced after slowing down from say, 45mph and applying the break down to about 10mph and then re-accelerating. There is an annoying lag in the engine response. I can feel the accelerator go down but it takes a second for the engine to come to life. All other engine/tranny performance seems normal.

Has anyone else had this problem? It is subtle, but annoying after driving around town all day.

P.S. I am very happwy with all other aspects of the 4Runner (except for the rediculous iPod menu interface controls :D

Thanks for your input.
Click to expand...

Mine is actually very responsive. I drive an 06' F-150 at work and that has a HORRIBLE delay!
 
You gotta live with it. Mine does it and the new tundra does it bigtime. Electron driven throttles. Not perfect.
 
On my V6 Rav4, everytime I slow down but not to a complete stop, then I downshift to 2. It makes it so much better cause the Rav will be in 2nd gear before I gas it again. When I don't do that, then there's the hesitation as the transmission decides that it should go down to 2nd, but cause I'm stepping on the gas, then the tranny slips into 2nd so it gives me the delay.
 
Norcal_Mike said:
I have a 2010 SR5 that has a pronounced hesitation when driving around town. It seems more pronunced after slowing down from say, 45mph and applying the break down to about 10mph and then re-accelerating. There is an annoying lag in the engine response. I can feel the accelerator go down but it takes a second for the engine to come to life. All other engine/tranny performance seems normal.

Has anyone else had this problem? It is subtle, but annoying after driving around town all day.

P.S. I am very happwy with all other aspects of the 4Runner (except for the rediculous iPod menu interface controls :D

Thanks for your input.
Click to expand...
No problem here. Just wanted to confirm , is it engine response or transmission lag? My 08 tundra seems to have a brain cramp when it comes to selecting a gear under the conditions which you describe. Hope this isn't a warning sign of potential accelerator problems.
 
Wow... after reading the responses and other threads, this sounds like a widespread issue that most people are happy to just live with. The hesitation is mostly annoying, but I can see how it can be a safety issue on slick roads... and yes, I too notice it more on right hand turns (not scientific).

I will try and have the system "reflashed" by the dealer and reply back here with the results (gonna do the battery disconnect first), but I am concerned the hesitation is considered "normal". I really hope this isn't the case, because I do a lot of around town driving and waiting for the transmission to make up its mind 100 times a day is unacceptable.

Thanks for your responses.
 
Norcal_Mike said:
Wow... after reading the responses and other threads, this sounds like a widespread issue that most people are happy to just live with. The hesitation is mostly annoying, but I can see how it can be a safety issue on slick roads... and yes, I too notice it more on right hand turns (not scientific).

I will try and have the system "reflashed" by the dealer and reply back here with the results (gonna do the battery disconnect first), but I am concerned the hesitation is considered "normal". I really hope this isn't the case, because I do a lot of around town driving and waiting for the transmission to make up its mind 100 times a day is unacceptable.

Thanks for your responses.
Click to expand...

This is why I really hate automatics. It takes too long to downshift when you need the sudden power. Unfortunately, we can afford one vehicle and my wife doesn't drive manual so I have to live with the auto until I can afford a second vehicle. :(
 
I dont mean to beat a dead horse, but I isolated the hesitation issue and am still curious if others have the same problem. It IS NOT a transmission issue at all and it may be just characteristic of the "fly by wire" accelerator. I also disconnected battery to try and reset, but nothing changed.

Scenario:
I held the transmission in 2nd and drove up and down the street "gunning" it by depressing the accelerator down 1/2 to 3/4 fairly quickly. There is a MAJOR delay between depressing the accelerator and getting a response from the engine. When I say "major", I mean about a half second before engine gets signal.

Before I take the 4Runner in for service, I wanted to see if other owners have this delay. I don't notice it off the line or at freeway speeds. I really hope its just a problem with my 4Runner and not widespread.

I used to be into old muscle cars and if they had a delay this pronounced, we would consider it a major issue (carb lag)...

Thanks again for your responses.
 
I occasionally notice that the ECU can't seem to figure out which gear it wants to be in. It feels like a lag, but it's more like it will high rev with low power then shift up a gear. I notice it mostly when I'm coming off the brake after making a slow 10 mph turn. It will stay in the lower gear used during the slow turn, then lag on the shift and finally shift up and continue.
 
Hi all. New 2010 SR5 owner here. Just going through the threads getting up to speed.

I too have noticed this behavior. It is most noticeable while doing a "rolling stop"...(slowing to 8-10 MPH), then accelerating again. There is a lag before engine power ramps up. I do not think this is just related to drive by wire alone, as there is not any delay when hitting the gas from a stand still. I'm guessing it's in the transmission ECU software.
 
Hesitation Problem

I have the same hesitation problem with my 2010 SR5 and I just spoke to the technician at Toyota about the hesitation problem and was told there was no Flash out yet. He told me to bring the car in and a complaint would be filed. He said if enough people complain then they would come up with a flash. so everybody who has a problem with this hesitation please bring your car in !:thanks:
 
sporty87 said:
I have the same hesitation problem with my 2010 SR5 and I just spoke to the technician at Toyota about the hesitation problem and was told there was no Flash out yet. He told me to bring the car in and a complaint would be filed. He said if enough people complain then they would come up with a flash. so everybody who has a problem with this hesitation please bring your car in !:thanks:
Click to expand...
I just took my 2010 SR5 in today for this exact issue and got the "Normal" "Can't find an issue" answers. The service department escalated the issue and asked Toyota. The Service Advisor let me know that they opened a case and will want to monitor this issue more. I dont know exactly what that means in terms of getting some attention to this issue but I plan to call Toyota Customer Experience myself and get a ticket. I hope anyone else with this issue also does the same.
 
I wonder if it is part of the ECO system that makes sure there are no hard launches to hurt gas mileage.....Big Brother at work
 
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