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Old 17 Aug 2009, 03:46 pm
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Default 2006 Civic Si. Shifting and RPM.?

Is it normal for the RPM to stay high for an extra second when I let go of the excelarator then drop when shifting gears? Shouldn't the RPM drop automaticlly once I let go of the gas? Does that mean something is wrong with the engine? I've driven nothing but old cars and I'm looking to buy a Civic Si off of some one. Thanks!
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Old 17 Aug 2009, 04:49 pm
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sounds strange leave that car alone.
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Old 17 Aug 2009, 05:46 pm
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Join Date: Jul 2008
Posts: 30

It sounds to me like it is in your head. Maybe you just have never driven a newer or higher performance car, and you are attributing it to a problem. For example, maybe all the cars you drove just had old bearings, while the new Civic rolls freely. Therefore, it holds its speed better, which you are not used to.
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Old 17 Aug 2009, 06:01 pm
Join Date: Oct 2007
Posts: 53

Guys research before posting stupid answers.That is the famous "Honda Civic Si 2006+ Rev Hang".Just put that phrase between the quotes on google and look all the topics regarding that issue.This isn't a design problem Honda put this on purpose to reduce the emissions on the K20Z3 (Civic Si 2006+ engine).For 2006 model there is an ECU patch that can be applied by a Honda Service Center using the HDS (Honda Diagnostic System) that reduce just a little bit the lag of the accelerator pedal. Later 2006 models and above (2007, 2008 and 2009) already have the patch.Hondata a company dedicated into ECU modding of Honda Cars release a Flash Tool that will allow you to patch your car depending on the mods that your already have.They have a list of basemaps for Intake, Intake + Header, Header + Exhaust and many other combination of many popular aftermarket parts. It also have the ability to take FULL control of your ECU allowing you to set VTEC engagement, fuel delivery, ignition timing, rev limiter, launch control, Speed limiter, etc, etc. One of the best things of the Hondata FlashPro is that it removes the pedal delay completely making your car feels like a cable driven throttle body.This means that if you are going to get a 2006+ Civic Si this should be your #1 modification.I'm working on this site with a lot of info about this car take a look.
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