Question about Cars & Trucks
If it is really unburned oil and not soot mixed with condensation, then it could be the exhaust valve guide oil seals (and probably intake as well) leaking. Inspect the spark plugs to see if they have an oily appearance, which will be from the intake seals, but a good guide.
Small Hyundai motors were susceptible to this fault.
Posted on Dec 30, 2016
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Posted on Jan 02, 2017
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Nov 01, 2017 | Cars & Trucks
Put a long screwdriver directly on the
injector while the car is running. Hold the handle up to your ear. You
should be able to hear a rhythmic clicking sound. If you do, your injector is
good. Hearing a clunk-clunk type noise means you have found your problem. Hearing silence or unusual clicking
patterns means either the injector, wires or plunger may be bad or sticking.
You will either have to clean or replace them.
---------- To know more about fuel injectors and troubleshooting.Please click on the link below:---
Many a times you get black smoke from exhaust due to faulty injectors.Check fuel injectors. Leaking injectors create an overly rich air/fuel mixture and cause black smoke. Take the valve cover off and look at the exhaust part of the injector, when it is running. Each time the injector fires, you should see oil exhausting from it. If you see oil coming out, then the injector is good. When replacing a bad injector, take the glow plug out and crank the engine to get any oil out of the cylinder.----------------- This should help.Thank you.
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