What is the relation between cetane number and diesel knocking?
What is the relation between cetane number and diesel knocking?
The ignition properties of a fuel not only affect exhaust properties, but also the combustion noise. If the ignition delay is high, for example due to a low cetane number, most of the injected fuel burns explosively. This leads to the typical loud diesel combustion noise (“knocking”).
Where does the knocking noise from the engine come from?
The noise comes from deep in the bowels of your motor. When you rev up the engine, the pitch and frequency changes. At one point, it sounds like the knocking noise nearly disappears. When you let off the gas, it continues and maybe even gets louder.
What causes a no start on a 6.0L diesel?
Rough start, no start, and rough running conditions often occur due to the FICM, or Fuel Injection Control Module. The FICM supplies 48 volts to the two solenoids that control oil flow to the fuel injector. Excessive heat from the engine and vibration can cause the FICM to overheat or fail.
What are the problems with a 6.0 liter power stroke engine?
1) Ford 6.0L HPOS (High Pressure Oil System) The 6.0L Power Stroke fuel injection system operates on oil pressure, very high oil pressure. Problems with the HPOS are oil leaks (internal to the engine) due to failed/deteriorated O-rings that are caused by excessive oil temperatures (bad oil cooler) and high pressure.
Why does my 6.0L Powerstroke stick open?
The EGR Valve on the 6.0L Powerstroke regulates the amount of exhaust gases that are reintroduced to the engine. Just like the EGR Cooler, the EGR Valve is suspect to clogging issues from excess soot. The valve can stick open, causing poor performance. Often times this occurs due to excessive idling or poor fuel quality.
Rough start, no start, and rough running conditions often occur due to the FICM, or Fuel Injection Control Module. The FICM supplies 48 volts to the two solenoids that control oil flow to the fuel injector. Excessive heat from the engine and vibration can cause the FICM to overheat or fail.
The noise comes from deep in the bowels of your motor. When you rev up the engine, the pitch and frequency changes. At one point, it sounds like the knocking noise nearly disappears. When you let off the gas, it continues and maybe even gets louder.
Why does my Vortec 6000 make a knocking noise?
If you get a check engine light and codes for engine knock on your 6.0L vortec, it could be actual engine knock. However, if you do not hear any knocking noises but do have a CEL, you likely have a bad knock sensor. On the 6.0 engine, the knock sensor has a pretty crappy sealant on it which can cause water to enter the sensor.
The EGR Valve on the 6.0L Powerstroke regulates the amount of exhaust gases that are reintroduced to the engine. Just like the EGR Cooler, the EGR Valve is suspect to clogging issues from excess soot. The valve can stick open, causing poor performance. Often times this occurs due to excessive idling or poor fuel quality.
