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issues with volvo tamd 74 edc

Discussion in 'Technical Discussion' started by stinkpotter, Mar 28, 2013.

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  1. stinkpotter, Mar 28, 2013
    #1
    stinkpotter

    stinkpotter New Member

    Joined:
    Mar 18, 2013
    Messages:
    5
    Location:
    Coronado CA
    Have twin six cylinder volvos with approx 700 hrs ... Having starting problems with the edc pre start on the helm .. the nuetral , diagnosis, live station control works inconsistantly . Also thinking I have a blown head gasket as my oil level is too high and my coolant has droplets of oil in it . Any one else out there had these problems with these mains ?
    Thanks,
  2. Soulstice, Apr 3, 2013
    #2
    Soulstice

    Soulstice Member

    Joined:
    Apr 1, 2013
    Messages:
    149
    Location:
    Portsmouth, Ri
    I have the same engines and ran into the issues with the EDC units and it working sporatically, shifting from neutral to forward, rpm's jumping, etc. The issue is with a bad wiring harness from the engine to the EDC computer and to the helm unit. There was a recall in 2003 or 2004 for this issue and I believe Volvo is still honoring it. Once I got mine done, I have not had a single issue.

    In regards to the 2nd issue, these engines don't have a history of issues like that and it may be more related to maintence.
  3. Capt Ralph, Apr 3, 2013
    #3
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    13,439
    Location:
    Satsuma, FL
    As we have responded in many threads with similar issues. Check all connects, check them again. Contact the area factory rep and check any electrical connection, maybe again while checking all VB+ levels.

    There is a good hint in these comments somewhere.

    Fuel in the sump? Another problem. Any additional info you can share? Compression or leak-down results? Case blow-by? History of overheating? Hours?

    ,rc
  4. 993RSR, Jul 1, 2013
    #4
    993RSR

    993RSR Senior Member

    Joined:
    Jan 15, 2004
    Messages:
    518
    Location:
    Annapolis/ Palm Harbor
    I bought a F/B boat 3 months ago with TAMD-74P-A Volvo's
    Lost RPM's after we started using it. 2600, then 2500, then 2400 at wot.
    After a few hours of operation the motors started sooting up the back of the boat top to bottom
    Replaced all fuel filters 3 times
    replaced waste gates, both
    replaced both boost sensors
    bottom and props are squeeky clean
    sooting got worse but got back to 2500
    Volvo tech comes for a test run with his computer hooked up. He first re calibrates the controls, after which we lost the port engine controls on the F/B. Lower helm works but not the F/B like it is stuck in diagnostic mode.
    I declined the sea trial. He could not get my controls back which have been working perfectly till he started f*** with them.
    I decided to have the boat awlgripped grey
  5. K1W1, Jul 1, 2013
    #5
    K1W1

    K1W1 Senior Member

    Joined:
    Sep 30, 2005
    Messages:
    7,427
    Location:
    My Office
    Hi,

    Don't blame the engines per se.

    Blame the supposed tech who played with himself and them first.