Why does my engine keep running after I Turn Off the engine?
EGR Valve Problems Another common cause for engine overheating is a stuck-closed EGR valve or carbon buildup interfering with valve operation. The Exhaust Gas Recirculation (EGR) valve is designed to introduce exhaust gases back into the combustion chambers to lower engine temperatures and, thus, harmful emissions.
What should I do if my diesel engine keeps running?
1 You can start by tracing each vacuum hose with your hands, trying to feel for rough, hardened, damaged spots. 2 Check that each hose is properly connected. 3 You can use a piece of vacuum or fuel hose to help you locate the typical hissing sound of a vacuum leak. Put one end… More …
What to do if your engine keeps running after turning off the ignition key?
If your engine keeps running after turning off the ignition key, try to troubleshoot and repair the fault as soon as possible. Dieseling can cause serious engine damage if the problem worsens. Check the different systems and components as outlined above. The sections are developed to help you find and repair the fault as soon as possible.
What happens when you turn off the engine on a Mercedes?
When you turn the key off on your Mercedes diesel, you may have noticed that the engine will not quit immediately. In some cases it may even keep running a second or two after you have turned the key to the off position before it finally quits.
Where does the vacuum go on a Mercedes 300D?
In all Mercedes diesel engines from the first 300D in 1975 up to the mid 1990’s, vacuum (suction) is used to turn the engine off – not electricity! In simple terms – there is a valve mounted on the rear or side of the diesel fuel injection pump. This valve has an arm attached to it that goes down inside the pump.
Why does my diesel engine not shut off?
Since a diesel engine does not run on electric spark, the engine has to be shut off by some other means. When you turn the key off on your Mercedes diesel, you may have noticed that the engine will not quit immediately. In some cases it may even keep running a second or two after you have turned the key to the off position before it finally quits.
What happens when you turn off the fuel pump?
This valve has an arm attached to it that goes down inside the pump. When vacuum (suction) is applied to this valve, the lever moves and shuts the fuel flow off inside the pump. Without fuel the engine cannot continue to run.