Question about 2006 Ford F 350 Super Duty

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I have an 06/F-350 with 190000.km recently started to puff blue smoke when started & quits smoking cmpletly when truck warms up fully. It also idels very rough after starting. It helps when i plug in the block heater. Could it be the injcters?

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  • mtymchyna Jul 14, 2009

    The rough idling only is only at start up it smooths out immediately after start up.

  • mtymchyna Jul 14, 2009

    the truck has a 6L diesel engine could a problem with the glow plugs be the problem?

  • mtymchyna Jul 14, 2009

    no the check engine light is not on.

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  • Master
  • 6,784 Answers

HI, i have a question. is the check engine light flashing or, illuminated at this time??

Posted on Jul 14, 2009

  • 5 more comments 
  • Michael Masters
    Michael Masters Jul 14, 2009

    Ok, this is not an injector situation. this is basically Cylinder wall issue, in conjunction with a worn valve train as well. You have several issues concerning massive oil consumption at this time. it should be noticeable in between oil changes but, not all cases will occur this way. it will simply get worse overtime and, you will continue to see this blue smoke(burning oil or, escaping oil into the cylinder chamber due to worn piston rings).

    The valve train issue consist of a worn rocker set, which is causing the rough idle and, worn valve lifters and valve stem seals as well. I'm sensing some head gasket leaks as well. This will cause low cylinder compression as well. this is also contributing to the rough idle.

    These issues will constitute a major repair situation. i recommend replacing the piston ring set and, i would replace the head gasket as well. have the valve train inspected for worn rockers and, valve lifters. Now, if there are no noticeable valve noises, this dose not exclude these issues concerning the valve train. there may be issues here. it is safe to request an inspection in the case. A compression test on the engine would be wise as well before any repairs are done.

  • Michael Masters
    Michael Masters Jul 14, 2009

    One more issue here that may need attention would be the O2 sensor(s). You have four on this engine and, one or more maybe out, open or shorted. this is highly uncommon in this situation but, it is worth taking into consideration during the inspection stages of the repair.

  • Michael Masters
    Michael Masters Jul 14, 2009

    Yes, this is typical but, you have serious issues concerning the cylinder walls. they should be machined asap. this will soon turn into a coolant leak as well. Internal coolant leak. There is only one reason for blue smoke in any engine and that is , oil consumption. this is much more than an injector issue. Once you initiate the compression test, you will see the results are not optimal and up to specs..

  • Michael Masters
    Michael Masters Jul 14, 2009

    I understand that this is a diesel engine. A fouled glow plug would trigger a CPU code. your check engine light would stay on until it was repaired. it would actually flash on and off if the plug was faulty.

    It wouldn't produce blue smoke as well. Your ignition and fuel system is controlled by the PCM so, it would send a check engine light code if this was the issue.


  • Michael Masters
    Michael Masters Jul 14, 2009

    A glow-plug system problem is likely when you experience hard starting
    or the glow plug wait-light remains on.

  • Michael Masters
    Michael Masters Jul 14, 2009

    your glow plugs are ok....

  • Michael Masters
    Michael Masters Jul 14, 2009

    Generally, when the glow plugs are turned on, the plug relay makes a
    noticeable click. If no noise is heard, chances are the glow plug
    system is not operating

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