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  1. #1

    Calling all 4-tech experts!

    I've gotta problem. My poor 02 4-tech is sick.

    Problem started a couple weeks ago, when I start it cold it will not rev above idle till warmed up. It will stall and die. I cannot give it any gas till it's warmed up.

    there are no codes appearing
    It idles perfect
    It runs perfect after warming up for 10 minutes

    My thoughts:
    thoought it was CTS sensor, but OHM readings are right on
    Thought it was oil pressure sensor, replaced still same

    Any thoughts or things to check?


  2. #2
    King_Of_Fun's Avatar
    Join Date
    Jul 2007
    Catawba Island, Ohio
    Did this start after you filled the gas tank? When was the last time the plugs were changed? Did you ever change the $20 fuel filter in the tank?... Ron

  3. #3
    oil and plugs were changed while trying to diagnose by dealer.

    no, I have only owned for 3 months, so no fuel filter change.
    I'm willing but why would it run fine at full throttle after arm up?

    It started after a tank fill yes, but that was 2 tankfulls ago. I fill up everytime I go out.


  4. #4

    can anybody diagnose well? I could use some help

  5. #5
    Kiwi spanner handler
    Join Date
    Dec 2007
    Christchurch NewZealand
    I would be looking at the terminals and wiring related to the coolant temp sensor I would try another sensor but a wiring fault between the sensor and ecu/pins will cause similar issues

  6. #6
    Antiguan FZR's Avatar
    Join Date
    Jan 2007
    Antigua Caribbean
    How many hours? Have you checked compression?

  7. #7
    This is how I run a jetski shop in the desert nmpeter's Avatar
    Join Date
    May 2008
    Elephant Butte New Mexico

    my swag is the tps

    and you say a dealer checked this one out?..I assume they hooked the buds up to it? Checked the fuel pressure?...if the pump filter gets waterlogged it could be seriously restricting the fuel flow

  8. #8

    Join Date
    Jun 2005
    rome ga
    Borrow an ECU.

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