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  1. #11
    Elite Member
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    Apr 2004
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    3,254
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    East Coast of Lake Huron
    Tractor
    Deere, several

    Default Re: Shower of sparks from exhaust

    It means you have been puttering around and light loading the engine. Excessive idling and short run times also fail to warm the engine. Using a block heater below 40F ? That will shorten warm up time and provide cleaner combustion. All that happened is that you finally warmed the engine up, worked it and cleaned out the soot.

  2. #12
    Elite Member Chilly807's Avatar
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    Sep 2009
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    3,238
    Location
    Nova Scotia
    Tractor
    Kubota L3400DT

    Default Re: Shower of sparks from exhaust

    What the guys have already said is true.. a chunk of carbon flakes off in the combustion chamber and is first pulverized by the top of the piston then blown out of the muffler as a shower of sparks. We often see it running generator sets on a load bank. An engine that has been lightly loaded and carboned up will often do this when you take it to 100% load. Usually only visible at night.

    We often mistake high rpm for heavy load. This isn't true. A diesel engine is speed governed, which means the governor will maintain the set speed regardless of applied load within the engine's capability. It doesn't take a lot more fuel to run at 100% speed compared to low idle. When you add load the exhaust temperature increases, which is what causes the carbon to flake off and burn. A diesel engine running unloaded often has an exhaust temp of no more than 200 degrees F, the same engine at full power can be over 1000 degrees F.

    I've considered adding an exhaust pyrometer to mine on a few occasions, more out of curiosity than any need to monitor the exhaust temps.

    Sean

  3. #13
    Veteran Member crashz's Avatar
    Join Date
    May 2005
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    1,041
    Location
    Eastern MA & Upstate NY
    Tractor
    John Deere 770, Bobcat 753

    Default

    This happened to me in my 83 GMC when I was 18. Took my girlfriend at the time out and while climbing a steep hill (WFO in my old 6.2 diesel) I noticed sparks pouring from both tail pipes. On the flats it was fine. I was so scared that I made her jump out and wait while I inspected the truck. I didn't want us to get caught in a car fire.

    I always though it was rust in the exhaust system, as the truck was recently put on the road after a long stint in the garage. Never thought about carbon build up.
    I've had a wonderful evening, but this wasn't it. ~ Groucho Marx

  4. #14
    Veteran Member bigtiller's Avatar
    Join Date
    Feb 2006
    Posts
    2,103
    Location
    central Iowa
    Tractor
    JD 2720

    Default Re: Shower of sparks from exhaust

    Quote Originally Posted by Gary Fowler View Post
    I have been trying to think what WFO stands for and cant. Please enlighten me
    Quote Originally Posted by aczlan View Post
    Wide _____ Open

    Aaron Z
    We got the W and the O. Anybody know what the F is
    HAVE FUN

    Life is easier when you plow around the stumps.


    2720

  5. #15
    Super Member
    Join Date
    Apr 2000
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    5,672
    Location
    Cedartown, Ga and N. Ga mountains
    Tractor
    1998 Kubota B21, 2005 Kubota L39

    Default Re: Shower of sparks from exhaust

    Quote Originally Posted by bigtiller View Post
    We got the W and the O. Anybody know what the F is
    Can you think of any "F" word we do not use on this forum?

    MarkV

  6. #16
    Super Star Member
    Join Date
    Mar 2008
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    11,362
    Location
    Northern Fingerlakes region of NY, USA
    Tractor
    Kubota L3830GST, B7500HST, BX2660

    Default Re: Shower of sparks from exhaust

    Quote Originally Posted by bigtiller View Post
    We got the W and the O. Anybody know what the F is
    Let me google that for you

    Aaron Z
    A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
    Robert Heinlein, Time Enough for Love

  7. #17
    Veteran Member YesDeere's Avatar
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    Dec 2008
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    1,135
    Location
    Merland
    Tractor
    04/4310

    Default

    I've considered adding an exhaust pyrometer to mine on a few occasions, more out of curiosity than any need to monitor the exhaust temps.

    Sean[/QUOTE]

    My duramax has one that came with the 6 gun banks kit. It is interesting to see the difference between loaded and unloaded. Have had it pretty high towing trailers, over 1200 degrees.

    I would like to have one on the tractor too. Just for my own curiosity as well.

    These diesels like to be worked. Seems they will never get to temp without a load.

  8. #18
    Elite Member Chilly807's Avatar
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    Sep 2009
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    3,238
    Location
    Nova Scotia
    Tractor
    Kubota L3400DT

    Default Re: Shower of sparks from exhaust

    Quote Originally Posted by bigtiller View Post
    We got the W and the O. Anybody know what the F is
    Let's just stick 'fornicating" in there and see if it fits...



    Sean

  9. #19
    Elite Member vtsnowedin's Avatar
    Join Date
    Jul 2011
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    3,034
    Location
    central Vermont
    Tractor
    John Deere 5045E

    Default Re: Shower of sparks from exhaust

    Quote Originally Posted by YesDeere View Post
    My duramax has one that came with the 6 gun banks kit. It is interesting to see the difference between loaded and unloaded. Have had it pretty high towing trailers, over 1200 degrees.

    I would like to have one on the tractor too. Just for my own curiosity as well.

    These diesels like to be worked. Seems they will never get to temp without a load.
    My old David Brown 880 which I bought used about 1978 was probably built in the late sixties was not the least bit pollution controlled or fuel efficient. Under full load going down a road at night the excess fuel would still be burning as it went through the muffler and the top half would get cherry red 1400deg. F with plenty of sparks. I'd say it was a low tech machine but it had draft control, differential lock and a FEL .

  10. #20
    Veteran Member bigtiller's Avatar
    Join Date
    Feb 2006
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    2,103
    Location
    central Iowa
    Tractor
    JD 2720

    Default Re: Shower of sparks from exhaust

    Quote Originally Posted by Chilly807 View Post
    Let's just stick 'fornicating" in there and see if it fits...



    Sean
    Well I'll be a monkeys uncle. I never thought to go in that direction. I remember a time when a lot of my words weren't "church" words either.
    HAVE FUN

    Life is easier when you plow around the stumps.


    2720

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