Ford My '93 ford festiva manual when first startup of day exhausts lots of black smoke while warming up and near the end occasionally a cloud of blue smoke then starts to clear with no smoke once warmed, the car also sounds as tho it is idling slightly higher then it should be. Here is a link for Factory specification of my car. http://www.eurodb.com.au/Mobile/used-car-Specification/FORD/FESTIVA/WA/1993/ZUX/
Rings might be going bad but try an additive for that exhaust smoke first through the motor
SOURCE: 1996 Lumina 3.1 engine- After warming it up in
have the save problem with my 1990 chevy step-side most likely cause woud be as Uu mentioned above possible craced or worn piston ring.allowing oil to seep ito the combution chamber after you finish driving and car setting over night, try using cylinder conditioner at your local parts store, hope this helps.
SOURCE: why does my 1993 gmc smoke blue when i start it but clears up a little when it warms up
There is wear in the engine which allows it to burn a little oil. When cold, the clearances are looser, and a bit more oil gets through. It will be either the piston rings, or valve guides and seals, which need attention.
A compression test, which you can do yourself, will probably show a loss in compression in one or more cylinders. Do that to get a baseline, then squirt a teaspoon of oil into the spark plug hole and repeat the test. If the test result improves, the rings are worn. If not, the valve guides and seals need work.
http://autos.yahoo.com/maintain/repairqa/engine/ques056_1.html
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