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Pedjero runs very sweetly but blows black smoke on acceleration.2.5 turbo diesel exceed intercooler

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  • TripleTauto
    TripleTauto May 11, 2010

    mitsubishi turbo diesel car??

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A diesel is gonna blow black smoke might be normal

Posted on Sep 18, 2008

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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

Posted on Aug 19, 2008

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1992 Peterbilt 379 feels sluggish pulling load up hill and is blowing black smoke


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check for leaks in the intercooler hose fittings or cracks in the intercooler
black smoke under load indicates a faulty turbo or turbo air leaks.

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Blows black smoke when running 2600 rpm and boost goes down


I assume its the 6.0L diesel...If so sigh......double sigh.. I had one of these...triple sigh. I need a bit more clarification. How many km on the engine/vehicle. Also, you say that it blows black smoke while running at a constant speed at 2600 rpm, or while you are accelerating to 2600 rpm. Also, when you say the boost goes down, does it decrease by itself, or when the throttle is let off. The boost naturally goes down when the throttle is released (not trying to be a ****, i dont know how much you know). However, if the boost is going down by itself, while the engine is under load (its not supposed to, it should stay constant) it could be a couple of things, which "can" contribute to black smoke. If there is a leak anywhere from the turbo to the intake of the engine, it will cause the engine to get less boost, which means less air into the cylinders, which means black smoke. Check all of the connectors/tubing coming from the turbo to the intercooler, and from the intercooler to the intake manifold and see if there are any problems. The more costly problems which results in boost going down, and black smoke, deals with a problem with the wastegate on the turbo (controls how much boost is produced, and when too much is being made, it will bleed off excess pressure). So if your wastegate is malfunctioning, your boost will go down and you will get black smoke cause the engine is not getting enough air. also, around 160km...80mi, the injectors "can" start to go on the 6.0L diesels....I would check the turbo for leaks, the tubing for leaks, and the intercooler for leaks (a big rock can punch a hole in radiators and intercoolers...intercooler will be in front of the radiator). I hope this helps

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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

Dec 07, 2008 | 2005 Jaguar X-Type

1 Answer

Blowing black smoke on acceleration 2.5 exceed turbo intercooler I have a Mitsubishi 2.5 diesel with what sounds to be a similar problem except it happens when you rev the engine suddenly but stops...


1 Inspect Piston Ring Set Worn or broken piston rings. grey_line.gif 2 Inspect Valve Stem Seal Cracked or brittle valve stem seals allowing oil to enter combustion chamber. grey_line.gif 3 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders grey_line.gif 4 Inspect Fuel Injector Rich injector grey_line.gif 5 Inspect PCV Valve Plugged or damaged pcv valve. grey_line.gif 6 Inspect Engine Worn or scored cylinder block grey_line.gif 7 Inspect Piston Worn or damaged piston. grey_line.gif 8 Inspect Valve Guide Worn valve guides

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7 Answers

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

Jul 20, 2008 | 2002 Jaguar X-Type

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