Question about 1996 Land Rover Discovery

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Smoking land rover dicovery 1992 2.5tdi

I now it is a fuel problem the injectors seem to be fine and the turbo is working and the engin has new set valves smoke is ther all the time but you can not see the road behind you 2500 rpm

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  • cheesmurs Jan 31, 2009

    My landrover has not got a thin pipe between the inlet and exhaust manifolds. Any other ideas



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Disconnect the thin pipe that connects to a valve which is located between the inlet and exhaust manifolds this will cure it ,promise,older motors never had this at all

Posted on Jan 31, 2009

  • Colin Stickland
    Colin Stickland Jan 31, 2009

    it doesnt have an ecg valve between the inlet and exhaust manifolds ??? and their is no pipes from one to the other. right just getting my one ameaba brain cell into gear.92 model ??then look elsewhere,what colour is the smoke,?if its greyish then check timing ,on a indirect injection engine it should be anything from 6 to 8 degrees (ricado type cylinder head) as it might just need resetting as its running retarded which will cause it to smoke.Can you hear a bit of diesel knock on idle,if not then check the timing .thinking about it a turbo might be as much as 12 degrees but while moving pump with engine running you will hear and fell if its right.Place a finger on each injector pipe in turn and you should feel a resonance in pipe as opens and closes ,if not then injector isnt set to the tension for opening at the right pressure,this will cause it smoke as well.If smoke has a blue tinge to it check turbo bearings as this will draw oil into inlet manifold,if it bad and you turn engine off it will continue to run for a second or two and be all lumpy.If smoke has an acrid smell then check master cylinder as it could be drawing brake fluid through the servo from the rear seal on the master cylinder.My money is on the turbo bearing seal but i hope iam wrong as that is expensive.Just noticed new valves?? did you renew the valve guide seals,the ones that come in a little bag with head set ??



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Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor. How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found. I hope this helps you determine what could be causing your engine smoke

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