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I have a 99 f-250 4x4 with a powerstroke and auto tranny. I have noticed recentley that sometimes when the turbo is winding up it will also have a higher pitch sound to it and it will stutter or chirp. I know this sounds weird. I have really noticed it when I am pulling a load. Then the chirping or stutter from the turbo really can be heard. It will do it on ocassion when it is just the truck.I am a mechanic, but a old school mechanic. I do not know much about the new stuff. Would it be a leak causing the chirp chirp sound or could it be the turbo. I thought I would ask for help before it has to go to a shop and cost a bundle.
well if have read on this site about turbo stutter/ or cavitation. it is inherent on the the 99 and newer psd's. alot of people have changed out thier turbo wheels to the wicked wheel. a wheel design that was standard on the 94.5 to early 99's. if i am wrong somebody, please chime in, after all i am just a firefighter, not a mechanic, however i did stay...
Yeah that's turbo surge/stall (not cavitation), it can harm your turbo if you have a bad case of it. Best thing to do is get a wicked wheel. The noise you hear is the compressed air going backwards thru the turbo wheel (stalling). This puts a big jolt on the turbo. Do a search for "wicked wheel" or "turbo stall" to read up on it.
search the site. from what i have heard, you can take it easy and the turbo will not stall. as far as changing the turbo wheel, i have not personally done it, however it does not seem to be that big a deal. i am no expert by any means, but the guys on here make it sound pretty simple. maybe some one else can help you with the details.
Installation of the Wicked Wheel isn't particularily difficult skill-wise but it can be a real PITA labor-wise. Especially getting all those V-clamps lose if the truck has many miles on it. I just had my turbo replaced (long story) see:
NOW, I am thinking long and hard as to wheter I will go thru the install again.
BTW, from personal experience, do not attempt to do the WW install with the turbo still on the truck. Go ahead and take the time and remove the turbo. Otherwise, there is a very real possibility that the exhaust turbine fins will get damaged. Even the slightiest deflection could be catastrophic. Trust me I had it happen to me when I was doing my WW install and it is not fun ponying up hard earned cash to replace a perfectly good turbo just because some fins are out of whack slightly. Of course slightly is relative especially in light of how fast these things are spinning.
It is my understanding that this is NOT covered under the warranty due to the fact that the vehicle still performs close to intended specifications. NOW if the turbo were to fail for no other reason other than turbo stall then that should be covered barring any non-warranty claims due to modifcations.
From a business perspective, Ford is not willing to spend approx 3 to 4 hours to replace a compressor wheel unless it is "hardcore broke". Just my thoughts.