Do you still get black smoke when you accelerate?
You can still see a very light haze – almost like heat haze – under hard acceleration, but no black smoke any more. Also, if you generally potter around like I do, sometimes you can get a little soot build up.
Is it normal for a car to smoke when you accelerate?
But if it’s continually smoking even under gentle acceleration then you do have a problem. Otherwise, enjoy, it is character-forming. So don’t go to any expense until you believe it’s really not normal for your car. Your local tech-mech can confirm if you’re still not sure.
What makes blue smoke from car when starting and when accelerating?
What makes blue smoke from car when starting and when accelerating? 1. Lots of Blue Smoke When Starting Cars (not Diesel): Bad Valve Seals. If you see blue smoke coming out of exhaust after you have parked your car for a while and the engine is not a diesel, the probable culprit is Bad Valve Seals. Each engine has valves that open and close.
What happens when a Mercedes engine misfire occurs?
As soon as an engine misfire occurs on a Mercedes-Benz, you will notice poor engine performance and strange vibrations that in some cases can be felt even in the driver cabin. The first thing that comes to mind when you get an engine misfire is: “This is going to be expensive.” Take a deep breath because in most cases it doesn’t have to be.
Why does my Mercedes diesel engine not start?
However, if the engine is not running correctly automatic regeneration will not be started. Some of the possible causes are a faulty temperature sensor, swirl flap motor or EGR valve. Also, make sure you only use approved engine oil. Wrong engine oil can cause excessive soot build up.
Why does my Mercedes Benz engine misfire so often?
Engine misfires are one of the most common problems we see in many Mercedes-Benz cars. To be honest, it is not because MB cars are weak in this area, but because most owners forget that spark plugs are wear items and need to be replaced at the recommended intervals.
How to test a Mercedes-Benz smog test?
• Start engine and accelerate engine speed to 1400 rpm. • Allow engine to run with increased rpms for 7 minutes (or drive the vehicle for 7 minutes). Park position and allow engine to idle (with no load) for 6 seconds. Do not use A/C. • After this step turn the ignition OFF, wait ten seconds and repeat this test step.
What are the common problems with Mercedes diesels?
Here are some common problems that affect many Mercedes-Benz diesel models including E350, ML350, GL350, R350, Sprinter, R320 CDI and BlueTec models. Common problems Diesel Particulate Filter. As Mercedes DPF traps and holds soot, with time it reaches a point when it needs to be ‘emptied out’. This is done by regeneration.
Why does my diesel car smoke when I accelerate?
In theory you’re right, when running well a modern diesel should look pretty much smoke free. However, devices such as the EGR can play up, hence the smoke. There are other reasons of course, like I previously stated, but I bet the EGR is the no.1 culprit! Scoob. Used to have a C63…
Why do I get black smoke from my focus?
My Focus has no DPF of course, which in theory should prevent this. Could be other things, such as injectors, as already mentioned. Injectors spray pattern can degrade over time due to wear / deposits so the fuel doesn’t mist and fully combust, the unburnt stuff ejected & giving black smoke.
What causes a car to have black smoke coming from the exhaust?
6 Most Common Causes Of Black Smoke From Exhaust 1. Clogged Air Filters 2. Damaged Fuel Injectors 3. Faulty MAF Sensors 4. Bad EGR Valve 5. Damaged Piston Rings 6. Engine Deposits
Why do I get black smoke when I accelerate?
So, when you do boot it next, this can get dislodged giving you a cloud of diesel soot. This is of course different to the black smoke from the car over-fueling when the EGR is sticky. My Focus has no DPF of course, which in theory should prevent this. Could be other things, such as injectors, as already mentioned.
But if it’s continually smoking even under gentle acceleration then you do have a problem. Otherwise, enjoy, it is character-forming. So don’t go to any expense until you believe it’s really not normal for your car. Your local tech-mech can confirm if you’re still not sure.
What causes black smoke in the combustion chamber?
Piston Rings are designed to prevent the infiltration of engine oil inside the combustion chamber. If there is any problem with the piston rings, the engine oil starts flowing into the combustion chamber. The combustion of the mixture of this engine oil and the fuel delivers black smoke. 6. Engine Deposits