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Hi 'm Peter, First of al have you tried tis with out the air filter in. Check to see if your air filter is dirty also you ma want to check the fuel filter , when was the last time were they changed? Both could be an indication of starvation of fuel or air. When you accelerate and you get to a point where the turbo can force enough air through then you pick up a little speed however you can also damage your turbo by sucking in the seals . The fuel problem could be it takes some time for enough fuel to get through the filter to speed the engine up. Once it picks up speed and you try to punch the throttle like you are going to pass someone does it bog down in a bit? If so you used up the reserve fuel in the line and now the pump has to play catch up The fuel filter is located in the center of the engine in a round housing so get your climbing gear on unless you have really long legs you will have to stand on something or get up in there reach it all. the top comes off the housing and the filter lifts straight out. It is possible you have a fuel line sucking air but unlikely like I said lets start with the simple stuff first Air filter then fuel filter. Then we can go from there hopefully you don't have a turbo gone bad or a stuck waste gate. Let me know what you find.
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)
is commonly caused by a dirty automatic idle speed control valve and
throttle valve. Buy a can of throttle valve cleaner (do not use
carburetor spray cleaner!) from NAPA or Carquest (made by CRC
chemicals) and spray it into the air intake while the engine is
running, use up about 1/2 the can, engine will try to stall hold the
speed up, shut it down and let it soak for 30 minutes, restart and
blow out the remaining fluid, shut it down and disconnect the
negative battery cable for 5 Min's to reset the base idle control
have u had the fuel filter replaced. that or the pressre regulator. theres a check valve in every fuel system. in cummins semi engins its in the filter or in the pump. if u loose prime over night it will die from the air in the lines. can be bad on ur starter doing this alot. check ur fuel lines to see if any have come loose. also is the check engine light on. fiding a troble code can be helpfull
Diesel engines fire on compression alone (usually 400psi).The Truck may have air trapped in the fuel system.When you perform any fuel system repair on a diesel it is going to take alot of cranking to get the air out. You can take the breather loose and shoot a VERY small amount of starter fluid in the intake and it should start. Do not use starting fluid much as it can damage the engine. Good Luck.
ok , unplugged ox sensor cause engine light is on , then check the air filter and fuel filter for dirty and replace,connect the ox sensor, then disconnect the negative battery terminal few minutes, reconnect and test
sounds like you have a turbo with a bad bearing.
pull of the turbo and rotate it by hand to see if it is hanging up.
Most turbos start to make a different noise when they start to go.
Sometimes dirt can bypass the air filter if is not changed on a regular basis and can cause the turbo to fail or become dirty enough to cause it to spin slower, (the dirt prevents the exhaust to spin the turbo at the right speed and the air passing the fins can whistle), it will cause bearing failure after a while. Also if you have too much soot in your exhaust from too much oil, the exhaust side of the turbo can become too dirty to operate properly