Question about 1994 Ford F250 Supercab

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Engine idles rough and puffs black smoke out exhaust

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On petrol engines is caused by excissive rich mixture,on diesels the injectors need servicing as injectors are not atomizing properly the diesel and just dribling excess fuelwhich is the black smoke

Posted on Jul 09, 2010

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white smoke mostly is caused by over fueling so what i suggest you do is first of all check if there is no leak on the injectors and if there is none which means your valve sterm seals are damaged.When the head gasket is blown out you may have problems like :-loosing power when driving,over heating,idling problems and oil mixing with water, its not your head gasket.

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1992 gmc sierra turbo diesel starts and idles fine until warm up


It's time for a Italian tune up!

The blue smoke can be one of two thing.

oil drop from the valve stem (from engine head to cyclinders)
or
diesel soot collect inside the exhaust system.

===
I will take a 5-10 minutes high rpm (not redline) ran on the highway.
Pay close attention to the rear view mirror and look for black diesel soot.
=== I will use Diesel Cleen or similar product to condition the fuel. (keep moisture down)
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I can not rule out excessive blown by.
Can you get a diesel compression tester?
When was the last valve adjustment?

Please post the actual odometer on the engine and I will follow up on it.

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