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12-14-2015, 03:04 PM
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#1 |
 
Drives: 2017 ZL1 Vert - M6,SIM,CFW,NAV Join Date: Oct 2014
Location: United States
Posts: 499
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2010 2SS L99 Low Throttle Shutter/Hesitation 10K miles
I have a 2010 2SS Pace car with the L99. I've noticed this problem ever since I bought it with 7500 miles on it in August. I'm around 10500 miles now. Basically, at anywhere from 0 to 1/4 throttle, while in gear and driving, there's a slight hesitation / shutter. There are no codes. I've done the 2 fuse pull and have had the computer reset to relearn. This car only gets premium fuel.
Even with such low mileage, could there be something major? Is it a simple EGR valve? Any ideas? |
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12-14-2015, 05:58 PM
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#2 |
Drives: 2010 Camaro 1SS Join Date: Nov 2015
Location: CA
Posts: 360
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Does it happen when you put it in "M" mode and go through the gears your self? Have you done anything with afm?
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12-15-2015, 07:46 AM
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#3 |
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Drives: 2017 ZL1 Vert - M6,SIM,CFW,NAV Join Date: Oct 2014
Location: United States
Posts: 499
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I have not tried M mode. I have not touched anything on the car. Since it is one of the few rare pace cars, I don't plan on doing anything to it. However, I notice it on either commanded throttle as well as setting the cruise and just hitting it up 1 time. That slight increase causes a slight shutter. Not a big shake... just enough hesitation to notice. Also, at such low miles, I find it hard to believe it's anything real serious. Just a nuisance. Stomping on the gas gives enough hesitation to throw you in the seat at a time you really aren't prepared for.
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12-15-2015, 09:38 AM
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#4 |
    
Drives: 2011 Inferno Orange Camaro 2SS/RS Join Date: Nov 2011
Location: Pittsburgh, PA
Posts: 1,372
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That is why a lot of people buy the throttle controller. Mine did the same thing until I installed it.
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12-15-2015, 10:51 AM
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#5 |
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Drives: 2017 ZL1 Vert - M6,SIM,CFW,NAV Join Date: Oct 2014
Location: United States
Posts: 499
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As to not "modify" the car.... keeping it original... no enhancements... I don't want to put a "bandaid" on a problem. I would rather see what is causing it... IE: EGR... TPS... etc
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12-15-2015, 11:01 AM
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#6 |
  
Drives: 2013 Camaro 2SS RDP Tuned L99 Join Date: Apr 2013
Location: Ottawa, Canada eh?
Posts: 1,889
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It sounds to me like its the AFM. When the car is in 4 cylinder mode and you give it gas and all 8 cylinders fire back up.... My car used to shudder when coming back to 8 especially under light throttle input. AFM is disabled on my car in the tune I have now. So much better.
If you want to test this theory out put the trans in M mode. Pull back the left paddle and drop a gear. This should disable AFM I believe. Or f need be go up one gear then back down one and it will shut it off for sure. While still in full manual mode accelerate and see if you still notice the problem you are noting with shudder. Your car might be "working as designed" 
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12-15-2015, 11:15 AM
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#7 |
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Drives: 2017 ZL1 Vert - M6,SIM,CFW,NAV Join Date: Oct 2014
Location: United States
Posts: 499
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Sounds like a poor design to me.... lol.. Ok. I have a diablosport T1000 programmer. Since it's married to my wife's truck, I haven't attempted to do anything to the camaro other than just monitor it. I'll do some digging. Maybe disabling the AFM won't be such a big issue.
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12-15-2015, 11:45 AM
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#8 |
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Drives: 2013 Camaro 2SS RDP Tuned L99 Join Date: Apr 2013
Location: Ottawa, Canada eh?
Posts: 1,889
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Yes its a horrendous design and GM should be shot and pi$$ed on for it....
I can't say for sure its that but I sure as heck wouldn't be surprised. I found it unbearable on my car as it would splutter and fart at as low as 25 mph coming out of V4. Testing as I mentioned should allow you to see if it is the cuplrit.Your handheld would allow you to disable DOD (AFM) no doubt. My car has a custom email tune on it and it is so much better than the stock one my only regret was putting up with it as long as I did. I did use a Range device for a year to disable AFM but it would throw error codes from time to time which was annoying. |
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12-15-2015, 12:24 PM
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#9 |
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Drives: 2017 ZL1 Vert - M6,SIM,CFW,NAV Join Date: Oct 2014
Location: United States
Posts: 499
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All good. Thanks. I'll have a T1000 for sale if anyone wants it. Just have to restore the factory and reset it. The InTune i2 allows for more than one vehicle with licensing. So.... I'm going to upgrade. :-)
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12-16-2015, 08:15 AM
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#10 |
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Drives: 2017 ZL1 Vert - M6,SIM,CFW,NAV Join Date: Oct 2014
Location: United States
Posts: 499
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Manual mode seems to run fine. Guess I'll wait until I can afford the i2 and get the AFM disabled.
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12-16-2015, 08:36 AM
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#11 | |
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Drives: 2013 Camaro 2SS RDP Tuned L99 Join Date: Apr 2013
Location: Ottawa, Canada eh?
Posts: 1,889
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Quote:
I don't know if the i2 comes with one or not? I used a SCTX4 with a custom tune from Dynosteve. He is great to work with.... |
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12-16-2015, 08:39 AM
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#12 |
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Drives: 2013 Camaro 2SS RDP Tuned L99 Join Date: Apr 2013
Location: Ottawa, Canada eh?
Posts: 1,889
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double post...
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12-25-2015, 07:59 AM
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#13 |
 
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Is that a problem on the LS3 manual transmissions as well. I have a friend with symptoms just as your describing.
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My 2010 Camaro SS
COMP Cams XFI Street/Strip, Lingenfelter LS3 Heads, AHR Long tube headers + X pipe, FAST LSXR 102mm Intake manifold, LMR Cold air intake, Flowmaster 3" stainless steel exhaust, NoWeeds Exhaust cutouts, Platinum Valve spring kit, ZEX NOS system 175hp shot, Eibach Pro-Kit performance lowering springs (1" drop all around), Custom grills, bumper ports, etc.... |
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12-25-2015, 10:09 AM
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#14 |
Drives: 24 LT1 M Join Date: Oct 2015
Location: North/Central FL
Posts: 1,121
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You can get a range afm disabler. If you buy an old used one you can send it to range for a free firmware update.
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24 LT1 M6 Sharkskin Metallic
22 Mazda CX-30 |
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