A PCV valve leak can cause the air-fuel mixture to run too lean, and this will cause a rough idle. PCV valve. Proper periodic servicing of the PCV valve will prevent this situation from occurring. The fix is to service the valve regularly and make sure that it is clean and fully operational.
In some cases, PCV systems can also have an oil/vapor or oil/water separator. Aside from the PCV valve, the system’s connecting hoses can get clogged with sludge. Once the system gets pressurized, engine oil can seep into the intake tube and enter the throttle body. Worn Piston Rings
The disconnection of an EGR vacuum hose affects the efficiency and stability of the engine. When it leaks, it can make the EGR valve not open, increase the emission of harmful gases and also cause overheating in the engine. Below are some of the performance problems that are caused by the disconnection of the EGR vacuum hose: It should be noted
On some vehicles, a failing camshaft sensor may lock the transmission in a single gear until you turn off and restart the engine. This cycle may repeat intermittently. If the sensor begins to fail while your car is moving, you may feel the car jerking while losing power. You may experience a noticeable loss of engine power. 1) Worn Seals or Gaskets. If your vehicle has worn out or damaged crankshaft seals or valve cover gasket, then it will likely be leaking oil. Once that happens, your engine will be losing oil whenever you’re driving. This means you will need to constantly top off the engine oil to avoid engine damage.
Question: Why would the EGR valve leak oil? Answer: The oil may come through a seal from the actuator rod which somehow connects to the crankcase ventilation (CCV) system. This seems to be a recurrent problem on some models. You may try replacing the EGR valve and see if the problem doesn't return.
Sep 12, 2016. #2. You can take the EGR valve off and see how dirty it is inside, and see if the little valve is seated all the way closed. Often times what happens with these is over time the pintle shaft gets soot creeping up inside the actuator portion of the valve and the little mechanism gets sticky. When a valve cover is bad, you may notice an external oil leak. This would also lead to a lower oil level than expected. Depending on where the oil is leaking, you may also smell something burning. This problem can also cause oil in the spark plug wells, a misfiring engine or dashboard warning lights.
The EGR valve is also very caked up. There was also oil leaking from interface of intake tube to EGR valve. So, I have a couple of questions and ideas. First, since everything downstream of the turbo is oily, it seems logical that the turbo is the source of the oil.
A car air conditioner may emit a smell similar to exhaust fumes due to several reasons: Firstly, a refrigerant leak can generate this type of odor. This occurs when there is a leakage of the refrigerant, resulting in the emission of a smell resembling exhaust fumes. Another possible cause is a malfunction in the internal circuit boards of the
5.0 Cummins Engine Problems. DEF Pump Failure. Bad EGR Valve & EGR Cooler. Rough Transmission. Turbocharger Failure. CP4.2 Fuel Pump Failure. Note that the 5.0 Cummins is available in many commercial trucks and equipment. These problems are specific to the setup that was used in the Titan XD.
