1986 C Lebaron turbo 4 cyl. black smoke when

TD as in Turbo Diesel? They all tend from smoke a bit under acceleration.

White smoke is steam
Blue smoke is oil
Black smoke is rich mixture (in a gas / petrol vehicle)

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Black smoke at times is a indication of a rich running condition, This is where a mechanical condition of the enigine is necessary such as the compression test

If you can see the cam pulley it has either a circle of triangle on it and there is a mark on the head. Line these up and bring the crank to 0 on the timing marks. Put the belt on.

Expect to hear your head gasket needs replacing, at a minimum. White smoke means it's burning coolant. How much it will cost I can only guess, but usually a head gasket repair- a few hundred dollars-it's pretty time consuming and labor intensive, especially with all the turbo stuff that could be in the way. Good luck.

if its white smoke look for coolant getting into the cyls, black smoke could be leaking injectors

White smoke inducates the Vatican has elected a new Pope!

No, really... White smoke means that somehow oil has seeped into the intake manifold, which could mean a couple of things. Here are some of them::

1. the throttle body valve has failed. this tube runs in an oil port down the manifold from the head, about 4" long.

2. worn valve stem seals or guides.

3. worn/cracked head gasket leaking water/antifreeze into the combustion chamber (causing steam)

4. turbo failure.. smokes at idle

5. cracked block. fissure inside cast block. change motor.

Black smoke indicates too much fuel being introduced through 1 or more ports. This could be anything from a stuck injector to a bad ECM sensor.. even a clogged air filter (which would ****** the air, causing improper mix)

Engine also smokes when car driving if turbocharger still faulty. Did you change the engine timing belt (the timing belt kit) meantime? What about engine oil consumption? When engine glow plugs (one or more) burnt then engine exhausts white smoke at idling. Also white smoke at engine idling when water is still present in diesel fuel.

How white? I would get a can of carbcleaner and spray a little here and there around the intake area to see if you have a vacuum leak. If the smoke is real white like the clouds the you may have an internal coolant leak to a cyl.

did you check for vacuum leaks probably a vacuum hose thats been knocked off or eroded and needs to be replaced.