Why does my Ford F-250 knock when I fill up?
In the case of both the F-250 and and the F-150, the engine computer will retard the ignition timing if it senses pinging. Figure 1. Use the manufacturer’s recommended octane level in your vehicle at every fill up. If you are using the correct octane level of gasoline or using an octane booster and knock persists, go on to Step 2.
What to do when your Ford truck starts knocking?
Return the engine speed to idle and verify if the knock returns. If the noise intensity is more than a lightly audible knock at hot idle under 1200 RPM at engine operating temperature, replace the cam phaser. If your super duty has a start up rattle in the front of the engine that lasts for 1 to 3 seconds, replace the VCT Phaser Kit.
Why does my Ford engine make a knocking noise?
The knock may be heard inside the passenger compartment or the wheel well area. Some light noise is normal. The engine may require a cold soak overnight to effectively make a full diagnosis at hot idle, particularly when a VCT phaser is suspected. The knock is not prevalent at cold temperatures.
Why does my Lexus IS 350 make a knocking noise?
Check your oil level and oil quality to be sure it’s in good condition. The Lexus IS 350 has another, more serious issue with similar symptoms. There was as issue with oil getting to the cam gears in the Lexus IS 350. This is more of a rattle noise than a complete knock.
Why does my C300 engine make a knocking noise when I start it up?
Good advice anyway to wait until the engine gets down to its 600 RPM idle before putting the trans into gear. The consensus is that the crankshaft bearing takes time to pressurize in some C300 engines, hence the knocking sound on startup.
In the case of both the F-250 and and the F-150, the engine computer will retard the ignition timing if it senses pinging. Figure 1. Use the manufacturer’s recommended octane level in your vehicle at every fill up. If you are using the correct octane level of gasoline or using an octane booster and knock persists, go on to Step 2.
What causes cranky start in 2013 MB c250?
I did research online and found lots of mb C250 2012 and 2013 cars with similar mileage (40K to 60K) had exact same issue as mine. It can cause cranky start, failure to accelerate while driving and losing power. It can be extremely dangerous when car with this issue on the road, especially on highways.
Return the engine speed to idle and verify if the knock returns. If the noise intensity is more than a lightly audible knock at hot idle under 1200 RPM at engine operating temperature, replace the cam phaser. If your super duty has a start up rattle in the front of the engine that lasts for 1 to 3 seconds, replace the VCT Phaser Kit.