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RPM float while shifting?

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Old Aug 10, 2008 | 07:10 PM
  #1  
Slo5oh's Avatar
Slo5oh
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From: Mount Laurel, NJ
Default RPM float while shifting?

I was wondering if this is a common "problem" or occurance or if it is some wierd thing the factory did to make shifting easier.

Whenever I go to shift and push in the clutch, the rpms jump up about 2-300. Its annoying because I know its wasting some gas and it also makes me release the clutch diffrently than I prefer.

If its not something thats supposed to happen, is there a fix for it? Stickey throttle return spring?
Old Aug 10, 2008 | 07:15 PM
  #2  
mattdel's Avatar
mattdel
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Joined: Nov 2006
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From: Spfld, MA
Default RE: RPM float while shifting?

completly normal, yes. it is a function designed to prevent stalling.
Old Aug 10, 2008 | 07:16 PM
  #3  
5.0stanger's Avatar
5.0stanger
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From: Howard City, MI
Default RE: RPM float while shifting?

It is normal. It is from the IAC....just how it works. If you unplug you IAC, turn up you idle so it will stay running, reset your TPS, it wont do it any more, but then there are other issues like starting it cold.
Old Aug 10, 2008 | 11:05 PM
  #4  
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FuzzyDiceRule
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Joined: Jun 2005
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From: San Diego, CA
Default RE: RPM float while shifting?

i have come to like it

ive noticed from driving the mach where the RPMS drop immediately, it makes it ALOT easier to shift fast and keep going

at first it was annoying though
Old Aug 10, 2008 | 11:11 PM
  #5  
93 LX FiveO's Avatar
93 LX FiveO
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Joined: Aug 2006
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From: Haverhill, MA
Default RE: RPM float while shifting?

yea i kinda like it

although u do gotta get used to it

ive tried disconnecting the IAC and it runns like crap, with it connected i can chirp 3rd lol
Old Aug 11, 2008 | 12:32 AM
  #6  
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Slo5oh
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From: Mount Laurel, NJ
Default RE: RPM float while shifting?

I suppose Ill let it warm up tomorrow and unplug it to see how I like it.

I dont know about you fuzzy dice, but I shift fast and I feel that it impeeds on a smooth shift.
Old Aug 11, 2008 | 10:59 AM
  #7  
T M T T's Avatar
T M T T
 
Joined: Mar 2008
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Default RE: RPM float while shifting?

Yep the IAT will start to hang (Like getting off the highway and rpm drops to *only* 1800) when it starts to get dirty. I unplugged mine and yes on anything cooler than say 45-50 degrees it complains a bit.
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