Hello, tell me what's the problem? I have a Ford F450 2008 6.4 diesel, when I start overclocking somewhere on 2k revolutions, it starts whistling strongly, what can it be?

Question edited for clarity and translated into written English.
Question moved from Ford to Jaguar category.

You should always take the upgrades. They are fixes to known issues.

All Diesel engines are slow to start as they need pressure and heat which happens after a few revolutions of the engine.

Rough Idle is normally because the Throttle Body and MAF need cleaning.

https://www.google.com/search?q=x+type+2.0+diesel+clean+throttle+body

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Yes, it IS normal for a powerstroke diesel to require more revolutions of the motor to fire than for any gasoline engine. Combustion in gasoline engines is stimulated by spark plugs and many gasoline engines will start with little turning of the motor past the position where the ignition timing creates the spark and combustion occurs. Combustion forces the engine to continue rotating and combustion in that and other cylinders becomes a perpetual event. A Powerstroke Diesel engine requires more revolutions and speed of revolutions to create the heat necessary to cause the diesel/air mixture to combust. ALSO, the diesel is injected into the combustion chamber, at high pressure, by the injectors. The injectors are electronically controlled and the Fuel Control Module (computer) (also known as the Injector Control Module or ICM) tells each injector exactly when to open and inject diesel into the combustion chamber, as well as for how many milliseconds it stays open (how much fuel will be delivered). Summary, a powerstroke diesel will only begin the perpetual combustion process when the motor is turning fast enough and the pistons are compressing the volume of the cylinder into the tight space of the combustion chamber rapidly enough to create enough heat for the fuel to ignite and begin creating power to turn the motor without the aid of the starter. IN ADDITION, a Powerstroke will NOT start at all with weak batteries. Not only does the motor need to revolve rapidly in order to start, the injectors require a MINIMUM voltage of MORE THAN 12 volts in order to activate (open). The exact amount of voltage required can be different, depending on the Fuel Control Module (FCM) or "Injector Control Module" (ICM) type that is installed. (Note; terminology for the FCM / ICM tend to depend on who you are talking to, what resource you are reading, etc. They are the same thing.) If batteries are weak, the starter uses enough amps to drag the voltage down and, even though the starter turns the motor fast enough that any gasoline motor would fire right up, the ICM will never send the signal to the injectors for them to activate so, the cylinders never get any fuel and the motor never fires. I hope that helps. Yes, a 7.3L diesel will normally need to turn with the starter for longer than your gasoline fueled V10.

turbo whistle is common as it comes from the tips of the compressor wheel passing through the sound barrier and the turbulence occurs. IN the older trucks you would the turbo whistle as the engine reached full RPM just before a gear change. In smaller engine it is not do noticeable as there is an excess of air pressure that keeps the compressor wheel at a lower rpm and the pressure is dumped out. Turbo compressors reach revolutions in excess of 120.000 rpm under full load If it has just started to make the noise then check the intercooler system for leaks--loose clamps--- splits - Have the turbo compressor checked for damaged fins from the ingress of fine dirt from a bad air filter---check the air filter is not blocked as the turbo speed may result from running in a partial vacuum ( no load on the compressor wheel)

may be you should make a diagnostic and you can do it in a garage or you can do it by yourself if you want to do it by yourself you need some tools and you can find some good ones here: diyobd2.fr

hi u will probably find under the bonnet somewhere a fuel filter and or a housing that contains a bowl of somesort and on the bottom of it should be a bung, unscrew it anticlockwise and drain the water out, drain it until u can see and smell fresh diesel it usually takes quite a bit of water usually upto a cup or so to trip the light or a message so only drain out about 2 cups or so or u will have difficulties trying to start it, also there may be a primer button on the same housing or somewhere else that if u find it just pump it until it goes hard then start it up and and hold the revs and 2k or so for a half a minute or so and away u go, it may stop after immediatly after starting try starting again but avoid cranking for any longer than 10 or 15 seconds then give it 30 senconds or so and try again it should start if no go after 2 or 3 attempts and u found the primer button try priming until it goes hard again and follow this again, if not just leave it a little longer between attempts and you will slowly purge the air out of the system

hope this helps

Hi Austin, I think you hit the nail right on the head! Replace the glow plugs:-) Regards John

Bad Head Gasket

White Smoke is Coolant being burnt

You done,stop using it

• You have a vacuum leak somewhere under the hood. A line has a big crack or slipped off of it's spot. That's why the whistle and the surging. Find your vacuum leak, fix and reassess. Do you have a check engine light on?

• If you have any comments please feel free to leave them here.
• Hope this helps and thank you for using FixYa.

Regards, Tony

Could be the alternator bearings (sound) or could simply be air getting in the hoses check all air hoses by tightenning all the clamp screws (which is quite common to loosen over time can cause the car to run like **** and the sound)