Question about Jeep Liberty

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Smokes black no power and fuel knocks soot comes out the exhaust

Turbo is new all turbo hoses are good injectors good this is a 2005 jeep liberty diesel

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  • 2,101 Answers

Your have a weak spark. ignition control module

Posted on Dec 07, 2012

  • 3 more comments 
  • chris Dec 07, 2012

    its a 2005 jeep liberty diesel

  • teds repairs
    teds repairs Dec 07, 2012

    grow plugs

  • chris Dec 07, 2012

    it starts great fires right up i dont think its glow plugs might be egr valve not sure

  • teds repairs
    teds repairs Dec 07, 2012

    can be bad injectors , a dirty air filter.

  • chris Dec 07, 2012

    injectors are good air filter is new

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  • 256 Answers

The poor thing is dead,

Posted on Dec 07, 2012

  • 6 more comments 
  • chris Dec 07, 2012

    its a 2005 jeep liberty diesel

  • teds repairs
    teds repairs Dec 07, 2012

    how many miles on it. there is a number of things that can cause the problem.

  • John Doe Dec 07, 2012

    The muffler bearings are over heateds in it (Dude)

  • chris Dec 07, 2012

    140,000

  • teds repairs
    teds repairs Dec 07, 2012

    go with the egr .

  • John Doe Dec 07, 2012

    Go with you EGR (TED)

  • chris Dec 07, 2012

    thanks ill try that next it might be stuck open

  • John Doe Dec 07, 2012

    No Nancy you got that wrong i was just getting snide wiith the so called mouth mechanic, (There) What thinks he got the answer for everry thing,With a diesel don,t full around end listen to people that never work on them,The average mechanic should not touch them, I was a certified mechanic for 45 years, End i will tell any body that has a diesel the same thing take it to somebody that is qualifeid to work on them.I would not touch them,

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Black smoke usually means a fuel problem, try changing the fuel filter and get an injector cleaner from tesco's or asda they're about £3 to£5, if your gonna change your fuel filter you might as well change the oil and filter and the air filter at the same time

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1 Answer

Had a large burst of black smoke coming out of the tailpipe. 2005 Jeep Liberty. No warning lights are on. Can you give me an idea what the problem is and how serious?


Black smoke out of the tail pipe usually means that there is too much fuel in the cylinder or not enough air. This could be an injector problem, it could be a sensor telling the injector to open too much.

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2005 diesel smart car starts then dies after a few seconds. changed pump. fuel filter, pressure sensor, cleaned air intake including turbo. Has good fuel pressure. cleaned injectors, have good spray.


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Would a faulty egr valve on my 02 PT Cruiser 2.2crd cause excessive black smoke and injector knock under full throttle....thanks


black smoke is over fueling and although the turbo appears to spin ok the vale variation actuator may not be operating correctly
there are vanes in the exhaust turbine housing that are altered to increase the exhaust gas flow onto the turbine blades for quicker acceleration and these vanes are operated by a vacuum actuator and rod by a sensor
the vanes are subject to extreme heat and can rust stuck open or the hose gets hard and cracks
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run the fault codes as well to get a better idea of the possible fault as some systems only put the light on for extreme conditions in engine and transmission

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How do i fix engine giving out so much black smoke and not even powering?


Black smoke is unburned fuel and a lot of it, so maybe you have a fuel problem. I would first check fuel pressure to see if you have a fuel pump or fuel pressure regulator problem. If the pressure is correct, next you could check for clogged or leaking fuel injectors.

If any cylinders are misfiring, that could be pushing a lot of unburned gas out the exhaust. Pull the spark plugs and see how they have been firing. That may indicate any problem cylinders. If all plugs are uniformly coated with a black soot, that means the fuel/air ratio is very rich. Check for air obstructions like a dirty air filter or check the fuel pressure regulator.

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1 Answer

Smokes black no power fuel knocks


If we knew what you were working on it would help. what all did you do to it, just a turbo? Is that why you installed a turbo? But lets start with Year, make, model and engine size. Any Mods done to it ? Do you have a BullyDog?

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Black smoke under acceleration that comes and goes. Have changed mass air flow sensor and did not help. Model is 2005 six speed turbo diesel


Black smoke indicates you are running rich. You may have to address the fuel injectors to make sure one is not stuck open. After replacing the MAF censor this would be my next step. Also your turbo seal might be leaking causing your truck to run rich throwing off the o2 censor. Also you can get black smoke from turbo blowby. Not burning oil but actual oil passing the rear turbine seal and getting into the exhaust. This should give you a few good places to check out. Good luck to you.

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Was on freeway and lost power. trouble restarting but no power and a lot of black smoke and some slight knocking. Left two black soot marks under car at rear and behind turbo or exhaust manifold, car has...


If you have a lot of black smoke then its over fueling getting to much diesel to the cylinder's. Sounds like an injector problem with the slight knocking noise. Che ck the return pipes are not blocked. If the smoke is dark brown then this is a problem with the valves on the intake manifold which control's the intake of exhaust emmisions.

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Turbocharger hose and black smoke


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Black smoke from exhaust


This is almost certainly a split hose - mine was the large hose coming out of the bottom of the EGR valve.

Speaking to a parts guy at my local Jaguar dealer, he said that the new part is uprated as Jaguar are aware that this is a problem.

The split allows more air in and results in the ECU changing the mixture and over fuelling - Black smoke is an indication of un-burnt Diesel. As well as the black smoke you may also notice a whistle/whine or sucking noise when you accelerate and a lack of power / lumpiness at around 2000rpm.

Hope that helps!

Graham

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