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Old Wed, Mar-19-2008, 12:33:12 PM   #1
zackbmwm3
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Cool Installed AA headers: slow acceleration!!!help please

Guys, I got headers installed on my car today and it seems like I have a delay when I push the gas pedal down fast. It didn't do this before the install because when I pushed the gas pedal it would almost give you whiplash from pulling so hard and fast. Now that headers are on, it seems to lag a little and not the quick response before the install. AA installed my SC and they flashed my ECU for the headers so that I wouldn't have to send it back. I don't have any warning lights on but want to get my POWER back. Can someone please help?

Thanks
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Old Wed, Mar-19-2008, 02:21:24 PM   #2
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perhaps it takes a little while for the ECU to adapt...how many miles have you driven with them?
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Old Wed, Mar-19-2008, 05:05:54 PM   #3
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do you have the stock mid-pipe?
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Old Wed, Mar-19-2008, 05:09:46 PM   #4
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Did u install the headers your self?

O2 sensors can be hooked up wrong, you might have an exhaust leak...

Or mabye your butt Dyno is out of calibration
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Old Wed, Mar-19-2008, 06:00:26 PM   #5
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Or mabye your butt Dyno is out of calibration
Boy I hope that is not his issue. Have you seen the machine used to do this calibration . . . talk about an expensive and painful proposition!
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Old Wed, Mar-19-2008, 06:08:49 PM   #6
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check to see if you have any exhaust leak first. You may not have to calibrate yet. f.y.i headers help exhaust flow in higher rpm range.
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Old Thu, Mar-20-2008, 02:32:09 AM   #7
zackbmwm3
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perhaps it takes a little while for the ECU to adapt...how many miles have you driven with them?
about 60 miles. This is what my mechanic stated because he cleared the adaptations. Someone told me that I am experiencing a loss of torque when i installed the headers.
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Old Thu, Mar-20-2008, 02:34:20 AM   #8
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Car is responding a lot faster today. Hopefully, it will continue to get better.
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Old Thu, Mar-20-2008, 02:45:10 AM   #9
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to my understanding, you will loose mild to moderate amount of low end grunt/torque with the addition of headers. the gains you will see are in the mid to upper rpm range. someone correct me if i'm wrong.
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Old Thu, Mar-20-2008, 07:51:56 AM   #10
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Quote:
Originally Posted by ///JTM3 View Post
Did u install the headers your self?

O2 sensors can be hooked up wrong, you might have an exhaust leak...

Or mabye your butt Dyno is out of calibration
Quote:
Originally Posted by 05SCM3 View Post
Boy I hope that is not his issue. Have you seen the machine used to do this calibration . . . talk about an expensive and painful proposition!


Quote:
Originally Posted by m3rxn View Post
to my understanding, you will loose mild to moderate amount of low end grunt/torque with the addition of headers. the gains you will see are in the mid to upper rpm range. someone correct me if i'm wrong.

True, but the loss in low end rwtq is so minimal that I truely don't think a butt dyno would ever notice...
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