Having Problems With Your 2010 SS/AUTO L99?

[KeepItGreasey]

If You Do Not Drive A 2010 Camaro, Or If Your 2010 Camaro Is Not Equipped With A Stock L99 Engine, Then Please Do Not Vote In The Poll.

Does Your L99 (AFM) Hesitate To Shift From V4 Mode To V8 Mode When You Begin To Accelerate After Coasting?

just trying to help a brotha out.

http://www.camaro5.com/forums/showthread.php?t=106325

Originally Posted by David79z28

My 2010 2SS Camaro has had a hesitation problem since I bought it 2-1/2 months ago. At any sustained speed, with or without the cruise on it heistates. The tach drops about 500 RPM for a second then jumps back up.

My dealer has another customer with the same issue. The dealer and I escalated the issue to some GM Regional Rep.

After all this time the rep tells me that this hesitation occurs on EVERY new Camaro. The Dealer dissagrees and has even let me drive other Camaros that do not do this.

Does your Camaro do this???

i've been having similar troubles myself. when i take it to the dealer and complain, i'm told that it's "a normal characteristic" - the hell it is. when they drive it on their own, they tell say "unable to duplicate customer's concern".

Originally Posted by KeepItGreasey

could be AFM calibrations... could be auto transmission calibrations... could have something to do with the lack of sensitivity in the accelerator pedal. i'll go from coasting, to accelerating - but for a second or two it feels and sounds like it's trying to accelerate with 4 cylinders in 6th gear before it decides to downshift and fire all 8 cylinders.

i want my AFM to turn on when i've got cruise control on, or if i take my foot off the accelerator... and that's about it. i don't want it "second guessing" my intentions when i apply more pressure to the accelerator pedal.

my 2010 L99 suffers symptoms that i would describe as "hesitation" as well. BUT... i have driven a 2011 L99 that did not "hesitate" like mine does.

i was told that if there were any calibration changes made for the new model 2011, that there would not be a bulletin sent out to make changes on any 2010 model.

if you have a problem like this, please vote and describe it for us.

[KeepItGreasey]

thanks for the vote. i test drove a 2011 Camaro and it did not hesitate for me. it's like night and day when you compare it to my 2010.

[David79z28]

I added 1 for ya....

[hypurone]

I am no longer stock, but when it was it never hesitated. Never missed a beat....

[Gone to the bowtie side]

I can tell you exactly what the problem is. I had the same problem on my 05 mustang. The electronic throttle body is bad.

[2010 SSRS]

must be something wrong with it, bring it back to the dealer, my L99 and has no hesitation at all from when it was stock until my mods.

[KeepItGreasey]

Originally Posted by Gone to the bowtie side

I can tell you exactly what the problem is. I had the same problem on my 05 mustang. The electronic throttle body is bad.

how was your 05 Mustang diagnosed?

[KeepItGreasey]

Originally Posted by 2010 SSRS

must be something wrong with it, bring it back to the dealer, my L99 and has no hesitation at all from when it was stock until my mods.

the dealer just gives us the run-around. you know how they are. they figure as long as the car starts, can be driven, and can be stopped... that there is no problem unless the "engine light" comes on and they can get an error code to read. i came to the dealer with this specific problem and was told to come back when the engine light came on.

the true mechanical craftsmen are gone. we don't have people who recognize a problem when it's right in front of their faces anymore. we don't have people who know what's wrong just by describing a noise. i went down to the dealer TWICE because my power steering was noisy, and only on the second visit did they care to check the power steering fluid reservoir - it was low. guess what. the engine light doesn't come on when the power steering fluid is low.

[Sevn86]

Sorry, i dont have a v8 camaro but my 2010 camaro does this from day one it just hesitates so much and i brought it to my dealers attention and they said its normal and im like WTF no its not! if any of yall figure it out please let me know...I almost died one time. I was under a overpass and i was yeilding to the cars coming and i thought that if i gave my car gas it would go and guess what my car didnt respond and then after 2 seconds my rmps jumped and nothing happend and then the car that was coming at me slammed on the brakes i let off the gas and slammed it again, it then finally moved...

[KeepItGreasey]

Originally Posted by Sevn86

Sorry, i dont have a v8 camaro but my 2010 camaro does this from day one it just hesitates so much and i brought it to my dealers attention and they said its normal and im like WTF no its not! if any of yall figure it out please let me know...I almost died one time. I was under a overpass and i was yeilding to the cars coming and i thought that if i gave my car gas it would go and guess what my car didnt respond and then after 2 seconds my rmps jumped and nothing happend and then the car that was coming at me slammed on the brakes i let off the gas and slammed it again, it then finally moved...

thanks for the story, it gives us a good idea of the kind of "hesitation" you're experiencing. but, yours sounds like a different issue maybe. do you drive with Traction Control turned on, or off? i turn mine off before i even shift out of Park. the only time i keep mine on is if i'm driving in the rain or an icy road. i understand that you bought a CAMARO, and you expect it to perform when you punch it. is this issue easily duplicated in your 2LT? - like if you took it out right now, could you punch it and have it not take off even though your RPM's go up? if it happened only once and you have never been able to duplicate the situation, i'd say it was a fluke thing that just doesn't happen regularly at all.

when i originally created this thread, i had a different kind of "hesitation" in mind. mine was more along the lines of having the engine "hesitate" to move from V4 Mode to V8 Mode. i feel it "flutter" like it is trying to accelerate in V4 Mode instead of V8 Mode like i'm understanding it should. and this is why is is so important that LS3 drivers do not chime in on this or vote on the thread. but for LS/LT AUTO owners, it may still be relevant.

thanks for your input! i would appreciate it if everyone who votes "Yes" on the poll leaves a comment and describes their symptoms, and when & how exactly this "hesitation" exists.

[Sevn86]

Originally Posted by KeepItGreasey

thanks for the story, it gives us a good idea of the kind of "hesitation" you're experiencing. but, yours sounds like a different issue maybe. do you drive with Traction Control turned on, or off? i turn mine off before i even shift out of Park. the only time i keep mine on is if i'm driving in the rain or an icy road. i understand that you bought a CAMARO, and you expect it to perform when you punch it. is this issue easily duplicated in your 2LT? - like if you took it out right now, could you punch it and have it not take off even though your RPM's go up? if it happened only once and you have never been able to duplicate the situation, i'd say it was a fluke thing that just doesn't happen regularly at all.

when i originally created this thread, i had a different kind of "hesitation" in mind. mine was more along the lines of having the engine "hesitate" to move from V4 Mode to V8 Mode. i feel it "flutter" like it is trying to accelerate in V4 Mode instead of V8 Mode like i'm understanding it should. and this is why is is so important that LS3 drivers do not chime in on this or vote on the thread. but for LS/LT AUTO owners, it may still be relevant.

thanks for your input! i would appreciate it if everyone who votes "Yes" on the poll leaves a comment and describes their symptoms, and when & how exactly this "hesitation" exists.

Idk how to turn it off...so its been on i guess...but what i meant was my car hesitates to speed up when i give it gas i can see my rmps go up when i accelerate but its takes awhile before the car actually responds (I normally never stomp on the gas pedal its almost always slow/ moderate acceleration). And about being able to duplicate the issue well its happened twice so i guess if i tried to do it right now i guess i could. Like the rpms jumped to 6000 and the car just didn't go. Oh and another thing is like if im at 65 miles an hour on the freeway and i want to speed up i will press the pedal a little harder then what its currently at and thats when sometimes it doesn't respond in time. It just delays...Its just very frustrating. None of the other cars we have do this...its just my car.

[KeepItGreasey]

Originally Posted by Sevn86

Idk how to turn it off...so its been on i guess...but what i meant was my car hesitates to speed up when i give it gas i can see my rmps go up when i accelerate but its takes awhile before the car actually responds (I normally never stomp on the gas pedal its almost always slow/ moderate acceleration). And about being able to duplicate the issue well its happened twice so i guess if i tried to do it right now i guess i could. Like the rpms jumped to 6000 and the car just didn't go. Oh and another thing is like if im at 65 miles an hour on the freeway and i want to speed up i will press the pedal a little harder then what its currently at and thats when sometimes it doesn't respond in time. It just delays...Its just very frustrating. None of the other cars we have do this...its just my car.

mmmmmkayyy


well down by the gear shift there is an auxiliary power jack (cigarette lighter style) and to the left of that, there is a button. tap that button once and Traction Control will be turned off, and you'll see a yellow light (TC) show up on your instrument panel. this will give you full power to your rear wheels without holding back to keep the tires from spinning. this is why i keep it on in bad weather or bad roads... but i'm not punching it all the time either. i just like the way it feels to have T/C off compared to T/C on.

i don't think i've even brought my engine up to 6000 RPM's, and unless you're using Tap Shift - your engine RPM's shouldn't be going that high. i recommend taking your car down to the dealer, and driving it with a technician in the passenger seat.

[Sevn86]

Originally Posted by KeepItGreasey

mmmmmkayyy


well down by the gear shift there is an auxiliary power jack (cigarette lighter style) and to the left of that, there is a button. tap that button once and Traction Control will be turned off, and you'll see a yellow light (TC) show up on your instrument panel. this will give you full power to your rear wheels without holding back to keep the tires from spinning. this is why i keep it on in bad weather or bad roads... but i'm not punching it all the time either. i just like the way it feels to have T/C off compared to T/C on.

i don't think i've even brought my engine up to 6000 RPM's, and unless you're using Tap Shift - your engine RPM's shouldn't be going that high. i recommend taking your car down to the dealer, and driving it with a technician in the passenger seat.

It normally never even goes past 4000 rmps but that time i tried to get out of the other cars way it just jumped and no response from the car what so ever....i was like o shit im died, im just glad the other car stopped. then the second time it happened i was really late and the signal turned yellow and i was close to the intersection and i pressed on the accelerator and thats when it jumped again with no response...ya im gonna see if i can make time to take it in to get it checked out...but first i got to find a good dealer who takes my issues seriously and just doesn't blow me off...so does this issue seem similar to your car or is it different?

[KeepItGreasey]

Originally Posted by Sevn86

It normally never even goes past 4000 rmps but that time i tried to get out of the other cars way it just jumped and no response from the car what so ever....i was like o shit im died, im just glad the other car stopped. then the second time it happened i was really late and the signal turned yellow and i was close to the intersection and i pressed on the accelerator and thats when it jumped again with no response...ya im gonna see if i can make time to take it in to get it checked out...but first i got to find a good dealer who takes my issues seriously and just doesn't blow me off...so does this issue seem similar to your car or is it different?

remember... "This happens with all the Camaro's" - isn't an answer.

[Pro Street]

My 2010 2SS/RS A6 built 02/2010 does it bad! I have HPTuners and thinking about turning it off!

[CFD]

I have not noticed any hesitation other than the time it takes to down shift when punching it. Curious to know does it happen when using tap shift or only when computer controlled shifting

[KeepItGreasey]

Originally Posted by Pro Street

My 2010 2SS/RS A6 built 02/2010 does it bad! I have HPTuners and thinking about turning it off!

the "Service Director" at my dealer suggested that... said it might fix the problem. then i suggested that any software calibration that i had performed by an outside company or by myself MIGHT void some warranties.

Originally Posted by CFD

I have not noticed any hesitation other than the time it takes to down shift when punching it. Curious to know does it happen when using tap shift or only when computer controlled shifting

yeah i completely understand the downshift time, but that's a different - less annoying issue that i figure there's nothing doable about. but the "hesitation" that i'm describing can be duplicated when i'm using Tap Shift as well. Tap Shift does not turn off AFM; it only allows you to drive at higher speeds in lower gears with higher RPM's - so not only are you not allowing AFM to kick in, but you're killing your MPG for the fact that you're not cruising in a higher gear when you could be. i could drive around town, "red-lining" it in 1st or 2nd gear and not get any "hesitation". i hope this answers your question.

[ssjoe]

mine was more along the lines of having the engine "hesitate" to move from V4 Mode to V8 Mode. i feel it "flutter" like it is trying to accelerate in V4 Mode instead of V8 Mode like i'm understanding it should.

ditto mine too.!

[KeepItGreasey]

Originally Posted by ssjoe

mine was more along the lines of having the engine "hesitate" to move from V4 Mode to V8 Mode. i feel it "flutter" like it is trying to accelerate in V4 Mode instead of V8 Mode like i'm understanding it should.

ditto mine too.!

yes... then after the "flutter" you feel it switch to V8 Mode and you accelerate smoothly. the car "hesitates" to accelerate because it's "hesitating" to shift over to V8 Mode. i was fed a line at the dealer saying that this was just the car trying to get better mileage.

i regularly drive a GMC Sierra with AFM. i can hear the exhaust note change when AFM kicks in - it doesn't bother me and isn't very noticeable. i don't feel any "flutter" or "hesitation" to change from V4 Mode to V8 Mode. that change is instantaneous.

[egad09]

Did not vote because it only occurs here and there. Depends on my driving pattern before cruising speed it seems. ALmost as if the car gets "sleepy" at times if your not driving kinda hard at times. BUT drive that sucker like you stole it and ZOOOOOM!! She never wants to stop!

[mbrusco103]

i dont get any hesitation on mine when i accelerate.. only in sport mode after i step on the gas hard for just a second or 2 and then let up to allow the rpms to drop a little sometimes it doesnt drop down right away it just stays kinda high reving almost as if it is rev matching like when you downshift in manual mode

[KeepItGreasey]

Originally Posted by egad09

Did not vote because it only occurs here and there. Depends on my driving pattern before cruising speed it seems. ALmost as if the car gets "sleepy" at times if your not driving kinda hard at times. BUT drive that sucker like you stole it and ZOOOOOM!! She never wants to stop!

yeah man, that's one way to get around it haha but i live in an area with a lot of schools and young kids around. i just cruise in mine... so people get a couple seconds to see how bad ass this car looks.

[KeepItGreasey]

the votes on the poll are at around 50/50 right now. though i know that there's at least one 2011 SS/Auto owner who voted "no". 2011's are not being considered in this poll.

[Shardik2SS]

Never had the issue with mine before I had the AFM tuned out.

[KeepItGreasey]

Originally Posted by Shardik2SS

Never had the issue with mine before I had the AFM tuned out.

and with it tuned out, it accelerates and smoothly as possible?