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3406e caterpillar engine

Had inframe, turns up to 550 when your loaded and shift the truck sputters and smokes black greyish color fuel system completely new along with injectors

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 14036 Answers

SOURCE: Chevy 3500 Express truck. fuel problem?

IF YOU GOT CYLINDER MISFIRE.OR OPEN FUEL INJECTOR.THAT WILL CAUSE THE PCM TO ENRICHEN FUEL MIXTURE.TO ADJUST TO DEAD CYLINDER.WHICH ACT AS A LARGE VACUUM LEAK.THATS WHY YOUR EXHAUST TAIL PIPES HAS A RAW FUEL SMELL AND WHITE SMOKES.

Posted on Sep 03, 2009

juswannadj
  • 42 Answers

SOURCE: 2004 duramax black smoke and sputtering when

Black smoke means "fuel not being combusted" or "runnig rich". I have no doubt you have gasoline. Your spark may not be burning the gas. Is there a check eng lite? If EGR was sticking, you would probably get a check engine light for this. If your truck has a Vortec design, I would find out if you need a new "spider". What is your mileage? Are you due for a tune up? What spark plugs are you using? Vortec? "Not all the time" sounds like intermittent. When was the last time you changed the fuel filter? Can't hurt to change this. This would be the actaul starting point for me. I would change the fuel filter which is under the driver under the chasis. You will need a 16MM and a 20MM. USE ONLY LINE WRENCHES. You may need a fuel line disconnect kit too depending on your model. Notice it only happens on acceleration? that is when you are forcing even more fuel thru the system, but not enough of a fuel stream make cause sputtering and when the fuel comes thru too rich that would be the black smoke. It sounds like you have the 2 extremes. is there afuel regulator on your vehicle? If so, you may need to change that too. Good luck.

Posted on Sep 10, 2009

  • 3 Answers

SOURCE: 4M40 engine lacking power and blowing black smoke.

http://www.delicaclub.com/load.php?id=20

Install the egr mod, will stop it smoking in no time
Delica owner...

Posted on Dec 21, 2009

  • 714 Answers

SOURCE: 1986 toyota truck 22r fuel injected. runs to rich

check for a vacumn leak, my buddy has a 96 dually that did that,found out it was his temp sensor to the computor,was showing a negative # when i tested it,he replaced it and it fixed everything! He couldn't believe it LOL

Posted on Jan 11, 2010

  • 4 Answers

SOURCE: 330 excavator with a c9 cat engine, heavy SMOKE

At the time you made all the above repairs, did you replace the "throw away" turbo charger? The turbo charger commonly sucks oil, and it is not repairable.

Run it without the inner & outer air cleaner. If it isn't the turbo, run the injector cut out test. If the injectors are ok, then you need to replace the injection system hydraulic pump, which is also unrepairable.

Posted on Apr 23, 2010

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Hi John, It would help to know more details? The color of the smoke gives a clue as to what is wrong with an engine. If the smoke is dark almost black grey it usually refers to a very rich fuel mixture, meaning that your diagnostics of flooding could be correct. If the smoke is a lighter greyish blue it usually means that the engine is burning oil. The first will mean finding out if an injector is leaking and once found replacing it. Also look for any damaged seals on both ends of all the injectors. I don't understand why you replaced the temperature sensor? Have you had a problem with the cooling system? Water in the fuel line can cause havoc and cause a misfire if it is not cleaned out. Vehicles don't run too well on water so I suggest that be the place to start your work. If there is water in the fuel system it will sometimes cause a light grey steamy smoke and definitely a misfire. Regards John

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Black smoke means "fuel not being combusted" or "runnig rich". I have no doubt you have gasoline. Your spark may not be burning the gas. Is there a check eng lite? If EGR was sticking, you would probably get a check engine light for this. If your truck has a Vortec design, I would find out if you need a new "spider". What is your mileage? Are you due for a tune up? What spark plugs are you using? Vortec? "Not all the time" sounds like intermittent. When was the last time you changed the fuel filter? Can't hurt to change this. This would be the actaul starting point for me. I would change the fuel filter which is under the driver under the chasis. You will need a 16MM and a 20MM. USE ONLY LINE WRENCHES. You may need a fuel line disconnect kit too depending on your model. Notice it only happens on acceleration? that is when you are forcing even more fuel thru the system, but not enough of a fuel stream make cause sputtering and when the fuel comes thru too rich that would be the black smoke. It sounds like you have the 2 extremes. is there afuel regulator on your vehicle? If so, you may need to change that too. Good luck.

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