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  1. #1
    RC Racer
    Join Date
    Jun 2012
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    148

    Is it time to trade in my TRX 3.3

    My Revo engine is about 3 years old. I don't use it that much maybe 2 gallons of gas run through it. I don't think more than that. Lately I have been having an issue with tuning. When I gun it, the engine bogs down and shuts off. I have tried to tune the needle and every time I think I have it, the same issue comes back. Weather has been a bit humid which I am sure does not help but my question is, is the motor worn out or do I just need to tune better. If it is worn out is there a way to repair it or is it better to just send it in for a new one? The motor has not been abused- Having said that I often do not do the after run procedure. Thoughts?

  2. #2
    RC Qualifier
    Join Date
    Apr 2013
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    469
    hsn is too lean. richen it.
    .

  3. #3
    RC Racer
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    Jun 2012
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    148
    I have rochened it and may help for a few seconds then back to where it was

  4. #4
    RC Enthusiast
    Join Date
    Sep 2013
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    28
    Air leak maybe causing it to be too lean?

    http://www.youtube.com/watch?v=tZ3WcPoa1DY

    This will help with tuning,

    http://www.youtube.com/watch?v=k4WbETNYa88
    Last edited by SgtTraxxas; 09-05-2013 at 12:35 PM.

  5. #5
    RC Racer
    Join Date
    Jun 2012
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    So you don't think this is an engine worn out problem and just a tune problem.

    Quote Originally Posted by SgtTraxxas View Post
    Air leak maybe causing it to be too lean?

    http://www.youtube.com/watch?v=tZ3WcPoa1DY

    This will help with tuning,

    http://www.youtube.com/watch?v=k4WbETNYa88

  6. #6
    RC Qualifier
    Join Date
    Jan 2013
    Location
    Gurley, Alabama
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    766
    When a nitro engine has lost compression they will usually start and run fine when cold, but will die at idle when it reaches running temps and wont start again until it has cooled off. When they're running to rich they will boooooog. And when they're running to lean they will b-o-o-o-o-o-g. If that makes any sense.

  7. #7
    RC Enthusiast
    Join Date
    Sep 2013
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    28
    Quote Originally Posted by benalexe View Post
    So you don't think this is an engine worn out problem and just a tune problem.
    You did say the weather has been more humid, which is going to make it work more when compressing air. So you may have to re-tune it. Don't get discouraged, it takes 5 minutes. Your best bet is to reset your needles back to the stock position(http://traxxas.com/node/50983) and go from there.

  8. #8
    RC Turnbuckle Jr. Nitronaught's Avatar
    Join Date
    Oct 2005
    Location
    South Florida
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    18,537
    Feel free to read over this sticky, along with the owners manual (there's a copy in the support section) it should help out if there's a tuning issue. http://traxxas.com/forums/showthread....&goto=newpost

    Hope it helps, feel free to post before massive hair pulling begins....

    You'll avoid the hair pulling if you go over the sticky I posted and read the owners manual especially about the part of the carburator and tuning for performance....
    Robin Williams
    He will be greatly missed...

  9. #9
    RC Racer
    Join Date
    Jun 2012
    Posts
    148
    Hi Everyone just want to say thank you. I am going to try all of the suggestions. Humidity is gone and I may have some time in the afternoon.

    One other question. I have watched y LHS tune and he runs the engine and hold the car in the air and runs on WOT to check the tunes. Is this okay for me to do? Seems easier than running down the street and it konks out half way

  10. #10
    RC Qualifier
    Join Date
    Jan 2013
    Location
    Gurley, Alabama
    Posts
    766
    You should never rev high rpm's with the wheels off the ground, it's very bad on the motor. And it takes more than a couple of seconds for adjustments to the tune to take full effect.

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