ON going problem with my 740 Turbo not starting

Discussion in 'Volvo 740' started by Damien, Jan 14, 2007.

  1. Damien

    Damien Guest

    I have a problem with my 740 Turbo 1988 with 230 motor. It was backfiring
    and finally died. It was suggested that the time belt had jumped a few cogs.
    So I started to fix and change a few things. I have put new plugs in, new
    spark plug leads, new timing belt, new harmonic balancer (as old one
    stuffed). It is getting fuel to the injector rail. I have cleaned the
    injectors.
    Any suggestions?
    What else can I try, does this model have a crankshaft sensor or some such
    if so where is it? LHS or RHS side of the motor?
    I checked the compression it is 150psi in all cylinders?

    Please any help would be good

    Damien

    Well I have checked a few more things, the tacho is ticking as I turn the
    motor.
    I took the injectors out and cleaned them and checked they were pumping
    fuel.
    There is spark at the spark plug end of the lead.
    Just wont fire
    Any other ideas?

    Thanks

    Damien
     
    Damien, Jan 14, 2007
    #1
  2. Damien

    James Sweet Guest


    Are you sure you got the timing belt set right? How about the plug
    wires, did you plug them in exactly the same order they were before? If
    either of these are off the engine will not run.
     
    James Sweet, Jan 14, 2007
    #2
  3. Damien

    James Sweet Guest


    Oh also try unplugging the air mass meter and see if it starts.
     
    James Sweet, Jan 14, 2007
    #3
  4. This is about the point to see if the fuel or ignition is at fault. Spraying
    a few seconds' worth of starting fluid on the air filter, closing the air
    cleaner box up and trying to start the engine will tell a lot. If the engine
    goes "vroom" and quits there is still a fuel delivery problem but the
    ignition is okay. Otherwise, the ignition - particularly wire connection or
    timing as James Sweet describes - is suspect. It's always possible the
    engine is flooded, but that isn't usual.

    Mike
     
    Michael Pardee, Jan 14, 2007
    #4
  5. got any major hoses leaking air ?
     
    John Robertson, Jan 14, 2007
    #5
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