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Thread: 7000 + rpm engine spluttering problem

  1. #1
    apriliaforum Member coopz78's Avatar
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    7000 + rpm engine spluttering problem

    Hi, i have a problem with my sxv 550. Bike start up 1st time and runs as normal below 6000-7000 rpm but occasionally as i open throttle up engine stats to splutter like there is an issue with fuelling.............
    I've change sparks and checked coils with multimeter.
    Im thinking fuel injectors? or fuel pump?
    Thanks

  2. #2
    apriliaforum Junkie undergrounder's Avatar
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    Tps throttle position sensor could be bad.
    search the forum for it, as it has been discribed in many topics before
    My bike is my gym, my wheelchair and my church all in one. I'd like to ride my bike all day long but I've got this thing called a job that keeps getting in the way.

  3. #3
    apriliaforum Member coopz78's Avatar
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    Quote Originally Posted by undergrounder View Post
    Tps throttle position sensor could be bad.
    search the forum for it, as it has been discribed in many topics before
    Thanks will do

  4. #4
    apriliaforum Member coopz78's Avatar
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    Quote Originally Posted by coopz78 View Post
    Thanks will do
    just realised the barometric pressure pipe was not connected to the outside of air box.

    do think this could be probable cause?

  5. #5
    apriliaforum expert levisik's Avatar
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    I don't think so. In my opinion there are two possible causes:

    - problem with TPS/harnes
    - problem with crank sensor
    2006 Aprilia SXV 450
    Tuneboy Cable available in Poland

  6. #6
    apriliaforum Member coopz78's Avatar
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    Quote Originally Posted by levisik View Post
    I don't think so. In my opinion there are two possible causes:

    - problem with TPS/harnes
    - problem with crank sensor
    ok thanks for your help

  7. #7
    apriliaforum Junkie SXV_Jack's Avatar
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    Quote Originally Posted by coopz78 View Post
    just realised the barometric pressure pipe was not connected to the outside of air box.
    i had this too and after correktion, the engine runs better.
    have you made a test drive ?

    TPS and CS is also something to check ... i remember that i read bad CS makes problemem primary on high U/min.

  8. #8
    apriliaforum Member coopz78's Avatar
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    Quote Originally Posted by SXV_Jack View Post
    i had this too and after correktion, the engine runs better.
    have you made a test drive ?

    TPS and CS is also something to check ... i remember that i read bad CS makes problemem primary on high U/min.
    update, reconnected barometric hose to out side airbox. I also recently put some injector cleaner in the fuel.
    Road it today for 25 mins and didn't have an issue. Weird!!!
    Also, on few occasions mid ride after stopping for coffee go to start the bike and starter relay just clicks........... so i put it in gear and roll it forward and hey presto it starts!

  9. #9
    apriliaforum Member coopz78's Avatar
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    Quote Originally Posted by coopz78 View Post
    update, reconnected barometric hose to out side airbox. I also recently put some injector cleaner in the fuel.
    Road it today for 25 mins and didn't have an issue. Weird!!!
    Also, on few occasions mid ride after stopping for coffee go to start the bike and starter relay just clicks........... so i put it in gear and roll it forward and hey presto it starts!
    Update - bike running as it should now. I think the injector cleaner and reconnecting barometric pressure tube fixed the problem.

    Thanks for all the help

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