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Old 05-05-2010, 09:18 PM   #1
chicagojoe16
 
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Car is 'Pulsing' Power

I have an SS with the LS3. I've been experiencing something that is kinda scary at times, I'm hoping someone here can give me advice. If I'm at a stop and decide to put the hammer down, I'll be fine in first gear but once I put it in second gear the car starts to give power in pulses. My right foot is still on the pedal but the car is jerking forward about every half second. Any idea what the problem is? Would the battery reset help this? A mechanical engineering friend of mine suggested that perhaps it's due to the way the body shop at my Chevy dealer put the left front wheel on after my accident back in January. He thought it might be a traction control issue.

Thanks for your thoughts.
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Old 05-05-2010, 10:34 PM   #2
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Do you have any mods?
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Old 05-05-2010, 10:52 PM   #3
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kinda sounds like traction control cutting in an out ?
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Old 05-05-2010, 11:02 PM   #4
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Quote:
Originally Posted by chicagojoe16 View Post
I have an SS with the LS3. I've been experiencing something that is kinda scary at times, I'm hoping someone here can give me advice. If I'm at a stop and decide to put the hammer down, I'll be fine in first gear but once I put it in second gear the car starts to give power in pulses. My right foot is still on the pedal but the car is jerking forward about every half second. Any idea what the problem is? Would the battery reset help this? A mechanical engineering friend of mine suggested that perhaps it's due to the way the body shop at my Chevy dealer put the left front wheel on after my accident back in January. He thought it might be a traction control issue.

Thanks for your thoughts.
I know exactly what you're referring to as I was experiencing the same thing. I took it back to the dealer, they did a 'reprogram of the ECM for power hop' at launch. This seemed to work for about 1 1/2 - 2 months of daily driving, but now I'm having the same problem again. Guess I'm gonna take her back in again but this time I want them to find what's causing this. No mods. Yet.
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Old 05-06-2010, 05:47 AM   #5
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Maybe try the fuse pull, 5 and 20 for 3 hours.
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Old 05-06-2010, 06:33 AM   #6
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Maybe try the fuse pull, 5 and 20 for 3 hours.
He has the LS3, the fuse pull is for the L99.
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Old 05-06-2010, 07:01 AM   #7
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mmm weird... tell us when you find out
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Old 05-06-2010, 07:02 AM   #8
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Take to dealer. Let them fix it.
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Old 05-06-2010, 07:06 AM   #9
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Originally Posted by Dpsyphered View Post
He has the LS3, the fuse pull is for the L99.

It works for the LS3 as well...at least it did for mine. Noticed an immediate difference.
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Old 05-06-2010, 07:45 AM   #10
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It works for the LS3 as well...at least it did for mine. Noticed an immediate difference.

Oh ok.. then I stand corrected. I thought the battery disconnect was for the LS3.

Whatever works!!
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Old 05-06-2010, 08:21 AM   #11
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Quote:
Originally Posted by Dpsyphered View Post
Oh ok.. then I stand corrected. I thought the battery disconnect was for the LS3.

Whatever works!!
Battery disconnect is not needed for either car. Just 3 hour fuse pull. There is a battery backup unit for ECM so the battery disconnect may have to be for days.
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Old 05-06-2010, 08:48 AM   #12
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No mods, don't really know what you mean by traction control sound. I think I'll try the fuse pull, see if that does anything. I can't get to my dealer for a while as I am at college until the end of May so hopefully the the fuses take care of it.
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Old 05-06-2010, 08:52 AM   #13
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Check the MAF (Mass Air Flow Sensor); make sure it's tightened down all the way and not loose.
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Old 05-06-2010, 10:24 AM   #14
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Quote:
Originally Posted by chicagojoe16 View Post
I have an SS with the LS3. I've been experiencing something that is kinda scary at times, I'm hoping someone here can give me advice. If I'm at a stop and decide to put the hammer down, I'll be fine in first gear but once I put it in second gear the car starts to give power in pulses. My right foot is still on the pedal but the car is jerking forward about every half second. Any idea what the problem is? Would the battery reset help this? A mechanical engineering friend of mine suggested that perhaps it's due to the way the body shop at my Chevy dealer put the left front wheel on after my accident back in January. He thought it might be a traction control issue.

Thanks for your thoughts.
Sounds like the traction control is kicking in when you shift into 2nd which limits power to the wheels when they try to spin.

Before you do anything, turn off the traction control and try it again. If your issue goes away, then this is what it is and pulling the fuses nor the dealer can help you as the car is running normal.
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