Very Low Idle and Stalling when Pulling the clutch in while coasting
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  1. #1
    Noob! ConLyfe's Avatar
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    Question Very Low Idle and Stalling when Pulling the clutch in while coasting

    Hello,
    New to the forum and hope to find use in getting some answers from this place!

    I just purchased a "New to me" 1997 Triumph Speed Triple T509 with only 6,000 miles on it. The bike was garaged at the guys house the majority of her life. Now my question is... The bike is supposed to idle at about 1100 Rpms (According to the manual). Mine of course... Is only pulling in about 500 Rpms. VERY CHOPPY!! And also, When I am riding, If i pull in the clutch while on a de-acceleration, The bike will stall out and I will have to fire it backup again.

    Once I am on the throttle, The bike runs good. I have adjusted my riding habits to where when I pull the clutch in, I move my hand to maintain the bike at 1,000Rpms to avoid stalling. As I know that I do not have to do that...

    I went to my local shop to ask them about it and they recommended to me that I run some fuel injector cleaner in it so that is what I am currently doing.

    Is there any way for me to adjust the idle or is it only done through the ECU

    I was planning on changing the plugs and air filter along with an oil change but I do not exactly understand how to pull the plugs or change the filter on this bike yet.

    Could the bike just need some ride time

    Any help is greatly appreciated!!!
    -ConLyfe

  2. #2
    The "Friends" of Officer Frank Poncherello 2doggs's Avatar
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    Went through the exact same issues with my 06 speed triple for the last two years. I boiled it down to the ICSV Stepper Motor or the TPS, aka Throttle Position Sensor. Got tired of taking the tank off and putting it back on so I trailered the bitch to a reputable Triumph dealer one hour away. Ended up being the TPS. $200 dollar fix and was worth every penny after my countless failures in diagnosis and solutions.

    It could be your tune, but I highly doubt that. My money is on TPS over stepper motor or tune. But it could be any three of those.


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    Originally Posted by m4ppy
    I have always ridden Aprilias and Ducati bikes, but after years of failing electrics and parts failing off I moved over to Triumph.

  3. #3
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    The "Friends" of Officer Frank Poncherello AA's Avatar
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    I’m not sayin’ Doubledoggy is wrong but I had the same problem earlier this year.
    I went on a long ride with a couple of mates and it cleared up after a couple of tankloads of riding.
    If it comes back this season I’ll be looking at the TPS.
    This is the wattle, the symbol of our land.
    You can stick it in a bottle, you can hold it in your hand.
    Australia, Australia, Australia, we love you, Amen.
    Crack a tube.

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  5. #4
    The "Friends" of Officer Frank Poncherello 2doggs's Avatar
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    Double A makes a good point. I just wanted to share my experience and fix.


    Sent from my iPhone using Tapatalk
    Originally Posted by m4ppy
    I have always ridden Aprilias and Ducati bikes, but after years of failing electrics and parts failing off I moved over to Triumph.

  6. #5
    The "Friends" of Officer Frank Poncherello crashmasterd's Avatar
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    I agree with these two one-balled inbred sheepshaggers.

    First put a couple tanks of fuel through it and some long, hard rides. Ride up to Shasta or something. Put a can of SeaFoam in it first. Second, check the Throttle Position Sensor isn't loose. It's easy to reach, on the starboard side of the throttle bodies. The idle stepper motor is a part of the Evaporative control system on the T509. I'd be looking for some vacuum leaks in that system before I got excited. (See the diagram below)

    If all the hoses are correctly routed and not deteriorated, and the throttle bodies are seated correctly blah blah blah, then you need to get a copy of TuneECU and a ODBII to USB cable and check to see if the idle is set properly. On this ECU you set the idle in the ECU Map, not with an idle screw. If it is correct in the Map, then it's likely someone has messed with the factory set idle screw and you'll have to deal with that. (Don't ask me.) Which is not to say that the idle stepper isn't bad for some reason. The idle stepper is part #14 in the diagram. Both the idle stepper and the throttle position sensor should be easy to replace. Both are just a wire and two screws.

    Oh, and the idle stepper motor has an 0-ring that might need to be replaced. Also, there's a mating surface inside between the stepper motor and the housing that might just need to be cleaned.

    Last edited by crashmasterd; 10-04-2019 at 07:54 PM.
    Quote Originally Posted by Bad Santa 1050 View Post
    Just when you think it can't get worse, Crash comes along and informs you that not only is the glass not half full, but it is stolen and contains a mix of horse semen, urine, laxative and viagra, right after you swallowed a mouthful...
    Quote Originally Posted by Joe Houle View Post
    ...no ink and going baconless on your bacon cheeseburger is about the most rebelious thing you can do these days.

  7. #6
    Noob! ConLyfe's Avatar
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    Is there any slim chance that these issues could trace down to a bad battery about to completly fail

  8. #7
    The "Friends" of Officer Frank Poncherello dr_gallup's Avatar
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    If your voltage is really low then all bets are off but in that case it probably won't start.

  9. #8
    Noob! ConLyfe's Avatar
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    Quote Originally Posted by dr_gallup View Post
    If your voltage is really low then all bets are off but in that case it probably won't start.
    The battery that is in manual spec has terrible reviews, could I just purchase a battery that has the save voltage and be good to go?

  10. #9
    The "Friends" of Officer Frank Poncherello dr_gallup's Avatar
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    I was able to get a little light oil inside my 1050 IAC stepper motor and bring it back to life. It's been working for about 2 years since I did that.

  11. #10
    The "Friends" of Officer Frank Poncherello crashmasterd's Avatar
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    Quote Originally Posted by ConLyfe View Post
    The battery that is in manual spec has terrible reviews, could I just purchase a battery that has the save voltage and be good to go?
    Get the appropriate Lithium Iron Phosphate replacement battery and the appropriate charger. You won't regret it.

    However that is almost certainly not your problem.
    Quote Originally Posted by Bad Santa 1050 View Post
    Just when you think it can't get worse, Crash comes along and informs you that not only is the glass not half full, but it is stolen and contains a mix of horse semen, urine, laxative and viagra, right after you swallowed a mouthful...
    Quote Originally Posted by Joe Houle View Post
    ...no ink and going baconless on your bacon cheeseburger is about the most rebelious thing you can do these days.

 

 
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