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cold start low idle

Discussion in 'Apex General Talk' started by Ridehard, Feb 13, 2020.


  1. Ridehard

    Ridehard Newbie

    Messages:
    3
    Location:
    Lake of Bays Ontario
    Country:
    Canada
    Snowmobile:
    apex
    06 apex , owned since new, 9k miles, exhaust donuts good for did for the second time last year, runs very strong however this started last week... on cold start the rpms do not climb to 2k and just sputters at 1000 like a cylinder is not firing. After 60 seconds go by (if it does not stall) the sled starts to idle fine and levels up to 1500. rest of the day it is perfect. ONLY on a cold start does this happen. checked vacuum lines and replaced the plugs , checked exhaust donunts and flex pipes. Still no change. doing research not sure what to do next.. change CO values or pull the idle control valve and blow it out or try a new air box temp sender Any input would be very helpful. Love this sled but this is driving me crazy
     
  2.  

  3. steiner

    steiner Moderator Staff Member Moderator Lifetime VIP Member VIP Member

    Messages:
    3,686
    Location:
    Niverville MB Canada
    I would try lower the CO first.
     
  4. Ridehard

    Ridehard Newbie

    Messages:
    3
    Location:
    Lake of Bays Ontario
    Country:
    Canada
    Snowmobile:
    apex
    Ok thanks Steiner will try tomorrow. Is there a sticky for such procedure by chance?
     
  5. steiner

    steiner Moderator Staff Member Moderator Lifetime VIP Member VIP Member

    Messages:
    3,686
    Location:
    Niverville MB Canada
  6. 03RX1-ER-LE

    03RX1-ER-LE VIP Member VIP Member

    Messages:
    1,123
    Location:
    M-Th Livonia Mich F-S Oscoda Mich
    Country:
    USA
    Snowmobile:
    2011 Apex XTX 6088 miles
    2009 Apex ER 6444 miles

    Trailer
    2016 Sport Haven 12 foot Hybrid trailer

    Tow Vehicle
    2019 F-150 Super Crew 4x4 2.7L EcoBoost in of course Yamaha (Velocity) Blue!
    LOCATION:
    Livonia Michigan
    When we see this in the automotive world, on high mileage vehicles which is way higher then your 9k, we use throttle body cleaner to wipe off the throttle plate and throttle bore. Then remove and clean the idle air control motor and passage.
     
  7. gouldsjett1

    gouldsjett1 Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    242
    Location:
    maine
    My son's apex just had a problem idling or should I say wouldn't idle at all. Had to keep sled running with thumb on throttle and it was running very rich. I noticed the fuel line on his fuel pressure regulator was pressurized to the point it almost popped off even with the clamp on. I removed the return fitting from the top of the fuel tank and took it apart to take out the check valve that was stuck. Sled started and idles perfectly now.
     
  8. Ridehard

    Ridehard Newbie

    Messages:
    3
    Location:
    Lake of Bays Ontario
    Country:
    Canada
    Snowmobile:
    apex
    was successful lowering the CO to -15 and the problem cleared up 90% I would say. Idle is a little low at 1050 or 1100 now when warm and will try to adjust up to 1250 1300. sled ran great all day. Thanks for your advise everyone. Appreciate it;)!
     
  9. steiner

    steiner Moderator Staff Member Moderator Lifetime VIP Member VIP Member

    Messages:
    3,686
    Location:
    Niverville MB Canada
  10. 03RX1-ER-LE

    03RX1-ER-LE VIP Member VIP Member

    Messages:
    1,123
    Location:
    M-Th Livonia Mich F-S Oscoda Mich
    Country:
    USA
    Snowmobile:
    2011 Apex XTX 6088 miles
    2009 Apex ER 6444 miles

    Trailer
    2016 Sport Haven 12 foot Hybrid trailer

    Tow Vehicle
    2019 F-150 Super Crew 4x4 2.7L EcoBoost in of course Yamaha (Velocity) Blue!
    LOCATION:
    Livonia Michigan
    Is this site not awesome, not mandatory but have you considered a VIP membership? We can keep this site going for years.
     
    maim and steiner like this.
  11. mbarryracing

    mbarryracing TY 4 Stroke God

    Messages:
    1,768
    Location:
    Springville NY
    Country:
    USA
    Snowmobile:
    2006 Yamaha Attak Turbo
    2015 SR Viper RTX-DX
    1996 Vmax 600XT
    I had the same fuel pressure regulator failure on my 06, stuck closed and wouldn't actuate when applying a vacuum.
     
    gouldsjett1 likes this.

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