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Dropping RPM during shift

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Old 05-18-2010, 07:49 PM
  #1  
nhbb289
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Default Dropping RPM during shift

Help, new 2009 std, when you shift it takes forever for the rpm to come down, any way to help this ?
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Old 05-18-2010, 08:02 PM
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conejo172
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At what rpm are you shifting?
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Old 05-18-2010, 09:57 PM
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Aziraphale
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Ford does this by design to burn off extra gas and help with emissions. I've heard a tune can help some but it's not going to go away.
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Old 05-18-2010, 10:03 PM
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Stoenr
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Tune will help tons. I noticed the same thing on my 1st time driving it, I hated it.
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Old 05-19-2010, 05:28 AM
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nhbb289
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Any rpm, and I assume by tune you mean chip as it only has 400 miles on it
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Old 05-19-2010, 05:57 AM
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Norm Peterson
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No chip. You reflash the ECM via the OBD II diagnostics port using a tuner. No disassembly or new parts required. Just a handheld tuner.

Momentarily raising the rpms on upshift with a MT has been an emissions tweak for several years (I think what they're specifically working to eliminate is lean misfire on a suddenly closed throttle, which spikes the HC). You notice it more in some cars more than in others, and they don't have to be drive-by-wire. I've always noticed this happening in our '01 Maxima.


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Last edited by Norm Peterson; 05-19-2010 at 06:00 AM.
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Old 05-19-2010, 07:46 AM
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Nuke
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Originally Posted by nhbb289
Any rpm, and I assume by tune you mean chip as it only has 400 miles on it
Chips are for eating. A custom tune gives you wood.

You obviously need to learn about the S197. CAI & tune combos are common power adders, in the realm of 20-25 RWHP, and the best bang-for-the-buck short of going FI plus they vastly improve driveability, especially on automatics. Use the search feature to learn more.
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Old 05-19-2010, 09:12 AM
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Slickvic_
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Originally Posted by Aziraphale
Ford does this by design to burn off extra gas and help with emissions.
BTW, most manufacturers do this now. I heard them bitch about this on the VW forums as well.
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Old 05-19-2010, 10:21 AM
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siggyfreud
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A lot of them do it by opening the Idle Air control valve in what is known as throttle following.
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Old 05-19-2010, 09:34 PM
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robs
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Both of my tunes have done this same thing. Anoying as hell.
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