engine hesitation

Discussion in 'VRSC Models' started by ridingmtnroads, Aug 5, 2008.

  1. ridingmtnroads

    ridingmtnroads New Member

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    My 08 Night Rod Special has about 1200 miles on it. It goes like hell, but below about 3400 RPM especailly in lower gears, it hesitates and feels a little "jerky". What comes to mind is bad gas (but I've been through many tanks) or something with the fuel injection - but I'm no mechanic.
    I mentioned it to the dealer when I brought it in for it's 1000 mile service and was told that this engine is only happy over 4000RPM and that it's a Harley, it's going to be a bit rough. I don't buy it...anyone else have expreience with this issue?

    K.
     
  2. glider

    glider Veteran Member

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    Tell them to go back to school, it's running lean and they come from the factory like that thanks to EPA.

    I would get a TFI and install it (easy install) and the bike will run MUCH better. Used them many times and unless you prefer to buy the SERT for $400+ and some dyno time and total it to about $700-900 this is the best choice IMO.

    http://www.techlusion.com/
     
  3. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

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    Glider,

    How does the TFI work - meaning does it replace the OEM ECU? If so, does the TFI throw any error codes if something is wrong?

    TQ
     
    Last edited: Aug 5, 2008
  4. glider

    glider Veteran Member

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    Hobbit has it nailed, basically all the TFI dies is adjust the pulse width of the injector pulses (richer) with the 4 pots in the unit., no timing or cylinder trim or any of those features like the PC III or SERT. There's 2 different units depending if you want to keep the 02 sensors in the loop or not.

    Here's some Q&A on the TFI (fuel nanny as they call it)

    Fuel Nanny FAQ
     
  5. hkhajah

    hkhajah Member

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    I would sugest Power Commander (PC III) , it will cancel the O2 censors and ride wonderful... just remember to change the baffles.
     
  6. Fisher

    Fisher Account Removed

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    My recommendation for VRod EFI tuning.Will cover any future mods to the bike should you wanna change it.