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5.9cummings diesel sweems to run well but hqs started blowing black smoke when accelerating

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Posted on Jan 02, 2017

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SOURCE: Jeep running rough; black smoke from tailpipe; dying occasionally

Have you taken a spark plug out yet? You may have fowled them out. if they are not clean and have a whitish tone to them, then they need to be replaced.

Posted on Nov 28, 2008

  • 40 Answers

SOURCE: kia sedona 2.9 diesel black smoke exhaust

Black smoke from exhaust means engine getting to much gas.

Posted on Jun 01, 2009

  • 850 Answers

SOURCE: 2005 chevy 6.6L turbo deisel losing power and blowing black smoke

pump may need recalibrating or a kit through it
or you may have a cracked turbo

Posted on Jul 20, 2009

  • 1 Answer

SOURCE: Black smoke on acceleration diesel x-type jaguar

can anyone tell me where the intercooler is on a 05 plate jaguar x type 2.0 diesel thanks

Posted on Nov 09, 2009

  • 1 Answer

SOURCE: 6.5 litre diesel engine, blowing lots of black

my 1995, 6.5 diesel turbo just shuts off when running

Posted on Dec 21, 2009

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1 Answer

Where is the fuel regulator kia sedona


check the turbo for failure and check the intercooler for cracks and leaks . check the hose clamps . have the tips of the injectors cleaned / replaced and if you want to blow the engine continue to use easy start. Diesels are compression ignition engines and that means the air is white hot at the point of injection of the diesel and any fuel substance introduced will spontaneous ignite and bend con-rods and crack pistons.

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Hi ,, i have a 4 litre mazda t4000 ,, its a horse truck ... it blows a fair bit of black smoke when going up hills and some white smoke when i start it up ... should i worry ... thanks


The black smoke is unburnt diesel fuel- lift your foot. When I was learning to drive diesel trucks (many years ago, in one of these trucks) I was taught that when going up hill under load, I should lift off the accelerator until it just starts to die off, then give it a little bit just to hold revs. No more black smoke.

When you start it, do you let the glow plugs heat for long enough? (Does it have them? I can't remember).

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My 2.0 L diesel automatic as just started billowing black smoke when I accelerate and stutters. serviced 4 weeks ago. any ideas


I had the same problem i put some red x diesel cleaner in tank and it cleared the problem after a good run.Hope this helps.

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Sometimes diesel engines will put out black smoke under extreme acceleration. Other than that, they shouldn't smoke. Black is excess fuel, White smoke is water and bluish is oil. White smoke on a cool morning is not necessarily a sign of a problem unless it happens every time you start it through a warm day. Hope this helps.

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Pedjero


Welcome to the world of diesels....

Black smoke is produced when too much fuel is injected into the cyl. There could be several issues here, but I would start with running a diagnostic on your O2 sensors and MAS/MAP sensors.

I hope this helps

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