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Question:

is there an additive i can use to stop black smoke from exhaust?

i have a skoda octavia tdi 1.9 auto reg 2007 which is burning engine oil and very heavy black smoke comes out the exhaust when i press the accelerator hard. 2 months ago i changed the oil and put long life on it, last week the sign came*(check engine oil) made me surprised when i checked it and nothing was left there? any solutions and ideas to avoid this problem plz? .

Answer:

Sound like your CV joints. It's best to have a garage replace them with new ones. Most CV joints are universal so you can get them cheaper at Autozone or a similar shop. They range in price $60 - $120 each but it's the labor that gets you. Labor can run $150 - $250 per CV joint. It's always best to replace both at the same time. Oh, and an alignment will run you about $70.
Well broken isn't right word! What was wrong is that the constant velocity joint was bad! Normally referred to as CV joint. There is one on each end of axle, -- if boot goes bad, they run dry, and it damages them. The grease will shortly burn out of brakes if you use them much, --probably by time you got to shop, the grease was long gone, and already burned off! There should be no connection with backfiring and bad axle, so I have no idea what caused that! If axle was actually broken the car would not move, - since it requires that it be connected to transmission as well as 'Hub end to drive wheels to make car move! Now about clicking, -- that was slop in CV joint possibly because of wear! If nothing was done to brakes, this is most likely problem. Brakes can also make clicking noise, - if disk got bent -- or possibly wheel was bent some, -- and clicking would be the worst in tight turns, the tighter the worse! I have seen really bad CV joints try to jerk the wheel out of your hands in tight turns (in this case it is at slow speeds)! On the BSing, - they were trying to hint that some of that grease under there was from the oil in struts! Many people might buy that!
This Site Might Help You. RE: How to tell if your car axle is broken? I recently had my right front axle replaced by tire kingdom for about $200. Previously I had wrecked my car and I was forced to replace the struts, suspension, brakes, and host of other things. Fortunately I had an Uncle that was able to do the majority of the repairs for a steal and since then my.
Black smoke means that the engine is running very rich. If it was burning oil, the smoke would be blue. No additive can fix either problem. Sounds like the vehicle has not been properly maintained for an extended period of time -- even a Skoda should not wear out that quickly -- and you'll need an engine overhaul now.

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