ISX E.G.R. question

Discussion in 'Volvo Forum' started by posford, Jun 17, 2015.

  1. Jun 17, 2015 #1
    posford

    posford Bobtail Member

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    Feb 26, 2011
    Northampton, Pa.
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    Can a faulty or carboned up EGR valve cause major engine failure from low boost and overfueling ? I've been driving a 2006 Volvo with the 530 hp ISX and the boost has been fluctuating and putting out a lot of black smoke from the exhaust. It has been doing this for at least the past year when I took over driving this truck. This past Sunday the engine blew up big time. i wound up jack knifing into a ditch. it has a huge hole in the side of the engine and dumped all the oil and engine parts for about 400 yards in the rain soaked right lane of I-80 in Pa., so again could the bad EGR could have caused this whole situation ?
     
    posford, Jun 17, 2015
    posford, Jun 17, 2015
    #1
    Johny41 Thanks this.
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  3. Jun 17, 2015 #2
    UltraZero

    UltraZero Medium Load Member

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    Jul 18, 2013
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    Wow... I would ask Cummins that question. Not to mention, why were you running the truck for so long knowing there was something wrong??? 530HP should a pretty strong pulling truck and if it's putting out masses of black smoke, it should have been put into the shop.

    Re EGR, I think depending upon which way the valve sticks, black smoke could/would be a problem. Also poor fuel mileage is also another part of a sticky EGR Valve. Now, completely blowing up the engine?? I think there might have been something else wrong. A blown block. Woops. Sounds very expensive.
     
    UltraZero, Jun 17, 2015
    UltraZero, Jun 17, 2015
    #2
  4. Jun 17, 2015 #3
    bigguns

    bigguns Road Train Member

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    Don't bother asking Cummins. I doubt very much that you will get an honest or factually correct answer. Along with UltraZero, why was the truck run that way for so long.
     
    bigguns, Jun 17, 2015
    bigguns, Jun 17, 2015
    #3
  5. Jun 20, 2015 #4
    KB3MMX

    KB3MMX Road Train Member

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    Running with a known defect is a great way to wind up in big trouble, especially if it caused an accident.
    And yes, high EGT will certainly kill any diesel.

    Black smoke is a virtual gaurantee for high EGT as you are overfueling the motor and it's not burning completely.
     
    KB3MMX, Jun 20, 2015
    KB3MMX, Jun 20, 2015
    #4
  7. Jun 20, 2015 #5
    posford

    posford Bobtail Member

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    Feb 26, 2011
    Northampton, Pa.
    0
    Thanks for the replies. The company didn't want to pay the $$$ to get it repaired even though the shop that re placed the leaking air to air recommended it. and yes, the fuel mileage went down from 6.5 to 4.2 - 4.9 mpg. The difference in fuel mileage last year could have paid for the repair and then some. But the company said to run it as is.
     
    posford, Jun 20, 2015
    posford, Jun 20, 2015
    #5
  8. Jun 20, 2015 #6
    Johny41

    Johny41 Road Train Member

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    I doubt the egr cause it , I read many similar stories about ISX pre- DPF generation blowing a hole through engine block; from what I read I understand the rods are touching the block after some wearing;
    i remember a post here a guy purchased one used and first trip got same problem; I know an OO working here got same problem with a 2005 Volvo with isx, the rods made a hole in block at aproxamitly 700k miles running slowly on flat I-35 close to Laredo; he sold the truck for parts.
     
    Last edited: Jun 20, 2015
    Johny41, Jun 20, 2015
    Johny41, Jun 20, 2015
    #6
  9. Jun 20, 2015 #7
    S M D

    S M D Road Train Member

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    sacramento ca
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    Last time I had a lot of black smoke the turbo was on its last limb. It was still working but not properly it was like a choo choo train for miles
     
    S M D, Jun 20, 2015
    S M D, Jun 20, 2015
    #7
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