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  1. #1
    Join Date
    Dec 2016
    Location
    Louisville, KY
    Posts
    137

    Default Sluggish condition leading to no start = 2 hr tow home

    2002 Supra Launch SS dd

    Put boat in water first crank fire up die immediately.
    Second crank fire up and stay on.
    Run boat through 10mph zone for 20 minutes followed by a hot lap around the lake then to party cove.
    Boat sits off while we hang for an hour.
    Time to leave. Fire up and die immediately x6.
    Seventh time as soon as it fires I throw it in gear and does not die BUT starts surging without touching accelerator.
    Cruise 5mph out of cove surge eventually goes away.
    Time to wakeboard. Rider in water ready for tow, hit the throttle to desired position, sluggish and then suddenly catches and takes off. Does this for half an hour then finally dies and won't fire at all. When the motor dies or surges I can hear a loud sucking sound as if the motor is being snuffed. Put three cold beers around the fuel pump to see if maybe I was vapor locked? No dice. While being towed checked wires, cap, vacuum lines. All look good. Started it a few times and she ran for 10 seconds then snuff sound and dead.
    Rest of tow didn't mess with it (about an hr), sat at dock an additional hour, time to load boat.
    Fires right up, no surge or snuff/choke, idled fine and didn't hesitate or give any issues. Loaded boat up and left.

    Thoughts??
    Thanks in advance.




    Sent from my iPhone using Tapatalk
    '92 Comp ts6m - 5.8 PCM Pro Boss Carb
    '02 Launch SS - 5.7 Indmar Assualt TBI

  2. #2
    Join Date
    Dec 2016
    Location
    Louisville, KY
    Posts
    137

    Default

    Also motor is throttle body injected. Both fuel pumps and plugs brand new. IAC also new.


    Sent from my iPhone using Tapatalk
    '92 Comp ts6m - 5.8 PCM Pro Boss Carb
    '02 Launch SS - 5.7 Indmar Assualt TBI

  3. #3
    Join Date
    May 2008
    Location
    Mt Juliet, TN
    Posts
    245

    Default

    Take you take a fuel sample to check for water?
    1987 Supra Saltare
    PCM 454

  4. #4
    Join Date
    Dec 2016
    Location
    Louisville, KY
    Posts
    137

    Default

    I've not taken a sample. Does it matter what part of the system I draw it from?

    Zk


    Sent from my iPhone using Tapatalk
    '92 Comp ts6m - 5.8 PCM Pro Boss Carb
    '02 Launch SS - 5.7 Indmar Assualt TBI

  5. #5
    Join Date
    May 2008
    Location
    Mt Juliet, TN
    Posts
    245

    Default

    You would want to pull it from the tank.
    1987 Supra Saltare
    PCM 454

  6. #6
    Join Date
    Dec 2016
    Location
    Louisville, KY
    Posts
    137

    Default

    Quote Originally Posted by leetudor View Post
    You would want to pull it from the tank.
    Thank you, I will try this. If I do find that there is water in the tank what's the next step?

    Zk


    Sent from my iPhone using Tapatalk
    '92 Comp ts6m - 5.8 PCM Pro Boss Carb
    '02 Launch SS - 5.7 Indmar Assualt TBI

  7. #7
    Join Date
    May 2008
    Location
    Mt Juliet, TN
    Posts
    245

    Default

    Drain and refill.
    1987 Supra Saltare
    PCM 454

  8. #8
    Join Date
    Dec 2016
    Location
    Louisville, KY
    Posts
    137

    Default

    Quote Originally Posted by leetudor View Post
    Drain and refill.
    Never had to drain a tank, what's the easiest way? Can I just pull the fuel supply line and let it gravity drain out the bottom of boat?


    Sent from my iPhone using Tapatalk
    '92 Comp ts6m - 5.8 PCM Pro Boss Carb
    '02 Launch SS - 5.7 Indmar Assualt TBI

  9. #9
    Join Date
    May 2008
    Location
    Mt Juliet, TN
    Posts
    245

    Default

    I use an 12v fuel pump.
    1987 Supra Saltare
    PCM 454

  10. #10
    Join Date
    Sep 2009
    Location
    Western PA
    Posts
    491

    Default

    Depending on your last fill up and how much fuel is left, you could get access to the fuel level sending unit and siphon the gas from there.
    I have one from Rural King or Harbor freight, Tractor Supply etc that I have added additional hose length to from Lowes.
    Depending on how much water you find, you could add Seafoam or put it into your vehicle diluted with good fuel.

    Siphon Pic http://cdn.overtons.com/product/020/20769_L1.jpg
    Last edited by jzelt; 06-08-2017 at 09:07 AM.
    2004 Supra Launch 22 SSV
    5.7L Indmar Assault
    "One More Hour"

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