2012 accelerator issue - Chevy Impala Forums
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post #1 of (permalink) Old 03-31-2019 Thread Starter
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2012 accelerator issue

Guess I maybe spoke too soon this morning about not having any unusual issues with our 2012. Wife tells me today after church that the gas on our car is acting weird sometimes when she first pushes the pedal. This just started a couple days ago. So after checking, I find that there is a hesitation when the pedal is first pushed. Throttle response is fine after that point, just a kind of dead spot that causes what seems like hesitation. I had seen where there had been issues and possibly some recalls on some 8th gen impalas for this type issue, but thought those were for earlier models and we have not gotten any recall notices.

Has anyone else with a 2012 or newer had a pedal response issue?

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......

Last edited by 12 lt; 03-31-2019 at 03:32 PM.
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post #2 of (permalink) Old 04-01-2019 Thread Starter
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Surprised no one has had or knows anything about this issue.

Oh well, went on and ordered a new pedal/sensor assembly from rock auto, $85 after tax and shipping. Hate throwing parts and money at a problem, but would seem the sensor has to be the issue.

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......
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post #3 of (permalink) Old 04-01-2019
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I would agree and probably would have done the same thing and tried a new pedal first... Sometimes, it's just quicker and easier to throw parts at a problem - especially if the part is a part that has some history of failing, like I have heard with the pedal.

Very curious to hear the results.
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post #4 of (permalink) Old 04-01-2019
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I work with someone that has one, not sure what year, and can't remember what the issue was as that was months ago she mentioned it but her son had to get a new petal that fixed something.
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post #5 of (permalink) Old 04-04-2019
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Had the same problem on my 2006. Replaced the gas pedal, no change. Turned out the motor in the throttle body was bad.
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post #6 of (permalink) Old 04-06-2019 Thread Starter
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Originally Posted by gahsr View Post
Had the same problem on my 2006. Replaced the gas pedal, no change. Turned out the motor in the throttle body was bad.
Thanks. Replaced the pedal today, no change. Wonder if rock auto will accept a return on it, may call or email them?

Guess I will be tearing into the throttle body next.

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......
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post #7 of (permalink) Old 04-06-2019
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Originally Posted by 12 lt View Post
Thanks. Replaced the pedal today, no change. Wonder if rock auto will accept a return on it, may call or email them?



Guess I will be tearing into the throttle body next.
Man, that sucks... I'd be willing to bet that RockAuto would take it back. Just say that you ordered the wrong part and want to return it - they should take it back. Technically, it wasn't really "used" - just "tested". :-) You just did them a favor by testing it for them.

I'm assuming you checked for codes already, correct?
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post #8 of (permalink) Old 04-06-2019
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Originally Posted by 12 lt View Post
Thanks. Replaced the pedal today, no change. Wonder if rock auto will accept a return on it, may call or email them?

Guess I will be tearing into the throttle body next.
If Rock Auto returns it I hope they don't resell it. I never like getting an opened box, especially electronic parts.
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post #9 of (permalink) Old 04-06-2019 Thread Starter
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Originally Posted by jtrosky View Post
Man, that sucks... I'd be willing to bet that RockAuto would take it back. Just say that you ordered the wrong part and want to return it - they should take it back. Technically, it wasn't really "used" - just "tested". :-) You just did them a favor by testing it for them.

I'm assuming you checked for codes already, correct?
Yep, checked for codes before placing the order.

I will call or email them and let them know the part did not solve the problem and see what they say. Think the part was $68.99 before tax, then shipping was 10.99 which I know I am gonna have to eat either way. I did order a couple ngk plugs for a 4 wheeler and an oil filter for 4 wheeler, but those shipped from a different location and paid additional shipping with usps on them but it was not much.

Oh well, like I initially posted above I hate throwing parts at a problem and this is exactly why.

Also agree with @Bill58 about his post on open box stuff. I may just hang on to it or maybe try to sell it on ebay "new in open box", don't know.

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......
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post #10 of (permalink) Old 04-06-2019
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^+1. Fingers crossed for you, but most brick-n-mortar parts stores won't take back elec. parts...
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post #11 of (permalink) Old 04-07-2019 Thread Starter
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Per their website, they do not accept returns on parts that have been installed. Went through the online return process and prompt said part was unable to be returned, will try to call them tomorrow but looks like I have a spare.

Next thought would be a faulty throttle position sensor on the tb. Am not finding a throttle position sensor for these cars anywhere on rock auto's site, autozone does not show one either although they do show an edelbrock position sensor compatible. When pulling a search for tps on the rock auto site it brings up the complete tb assembly and has the delco tb for $112.79. Guess I will have to try a part search by number after I take it off this afternoon. I needed to clean the kn air filter anyway.

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......

Last edited by 12 lt; 04-07-2019 at 08:36 AM.
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post #12 of (permalink) Old 04-07-2019
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Iirc, on this forum, thought I've read several people having to replace the entire throttle body...
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Think after my wife gets home with the car this afternoon I will clean the air filter, go on and take the tb off and clean everything since I will already have it partially disassembled and see if I can find a part number for a tps. Re assemble it all and after air filter is dry take a ride with my scanner connected and set it to collect live data and see if I can see anything there to give any clues.

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......
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Originally Posted by sheila View Post
Iirc, on this forum, thought I've read several people having to replace the entire throttle body...
Thanks Sheila, looking like that is likely to be the problem. Hopefully there is an available/replaceable sensor, at least the delco tb at rock auto is $112.79, autozone it is over $250.

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......
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@12 lt - I happen to have my stock 2012 throttle body sitting here (I replaced it with a ported throttle body). While I'm not sure that I want to sell it, I would be willing to let you try it so see if it solves your problem before you go ordering a new one that you can't return if it's not the problem.

Obviously, there would be shipping fees each way that you'd have to pay, but I just wanted to extend the offer if interested... PM me if interested...
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