Noise when backing off the throttle
Thread Starter
|
Senior User
Joined: Jun 2003
Posts: 100
Likes: 0
Noise when backing off the throttle
I have an '04 F250 4X4 SC that I don't drive back and forth to work any more because of the price of diesel fuel. I try to drive it maybe at least once a week. The other day i was driving it and noticed a noise coming from under the hood when I would let off after accelerating. It also makes the noise under 3/4 throttle acceleration. I have heard some people call this a turbo "phart". My truck has never made this noise before. I have about 17,000 miles on it, stock exhaust and use the Diablosport Predator (65hp setting). Any ideas?
Postmaster
Joined: Sep 2005
Posts: 2,725
Likes: 3
From: Florence,SC
your turbo is sticking. you can try this. go for a long drive at least thirty minutes of non stop driving. put the trans in 3rd gear and do alot of stop and floors. if the turbo can be saved this will do it. if not then it will need to be manually cleaned or replaced.
Posting Guru
Joined: Jul 2005
Posts: 1,617
Likes: 4
From: Denver, Co
Originally Posted by SonicBlueF350
The other day i was driving it and noticed a noise coming from under the hood when I would let off after accelerating.
I wouldn't say a stuck turbo, as the OP doesn't describe anything about making no/low boost or max boost.
Last edited by Deluxe05; Oct 19, 2006 at 10:28 PM.
Junior User
Joined: Sep 2006
Posts: 51
Likes: 0
Is the air fluttering back through the turbo bad, sounds like it would be. I wonder...
Whats the tradeoff with having a wastegate? Does anyone make a waste gate yet for the 6.0 if it is bad to pass back through the turbo?
Whats the tradeoff with having a wastegate? Does anyone make a waste gate yet for the 6.0 if it is bad to pass back through the turbo?
Posting Guru
Joined: Feb 2005
Posts: 2,295
Likes: 2
I can't say I'm an expert on VGTs... however, I know that my unchipped truck started experiencing turbo farts much worse shortly before the head gaskets lifted. The root cause was turbo overboost due to sticking vanes.
Postmaster
Joined: Sep 2005
Posts: 2,725
Likes: 3
From: Florence,SC
low miles is the problem. drive it in third gear hard like i stated and it might free up. this is not normal and it should not do it, period. the vgt system works like a wastegate.
Trending Topics
Senior User
Joined: Jun 2005
Posts: 106
Likes: 0
If you're farting on a regular basis - see a specialist. However, if it farts occasionally, like mine does, keep an eye on it. Lately, i have not been driving my 250 because of my business travel - I noticed my truck likes to be driven - and things calm down once it has been put through its paces. BTW, mines farted since new and especially when I nail the go-pedal and pull off quickly. No worries, here.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Elder User
Joined: Oct 2006
Posts: 624
Likes: 0
From: north texas
Originally Posted by SonicBlueF350
I have an '04 F250 4X4 SC that I don't drive back and forth to work any more because of the price of diesel fuel. I try to drive it maybe at least once a week. The other day i was driving it and noticed a noise coming from under the hood when I would let off after accelerating. It also makes the noise under 3/4 throttle acceleration. I have heard some people call this a turbo "phart". My truck has never made this noise before. I have about 17,000 miles on it, stock exhaust and use the Diablosport Predator (65hp setting). Any ideas?
Elder User
Joined: Oct 2006
Posts: 624
Likes: 0
From: north texas
tubo noise on a 2006 ps
Originally Posted by BowTieHatr
do you have a open element filter? you notice it more with a tuner due to the open element filter.
i run a k and n open element filter and a diablo sport tuner and i notice it farting sometimes when i floor it and let off the gas suddenly, the cold aie intake filter system is coming off and going back to k and n this week and the factory system is going back on until i can afford the afe stage 2 filter intake system, just got this truck back from ford for a warranty oil leak, they check the turbo also and said it looks like the impeller has been sandblasted a little because ths finish is coming off the impeller, they say that the filter is letting particles pass thru it or the intake is creating moisture or condensation and sucking it into the turbo and hitting the impeller when it is spinning at sonic speeds which is taking off the finish and dulling the veins.......
Senior User
Joined: May 2006
Posts: 410
Likes: 0
Mine farts more often when the truck hasn't reached operating temp after letting off after a quick spool. Almost seems like computer knows it is cold and makes it fart. dunno. Kinda telling me to chill until I see 190. It will fart more when in the higher power settings. It has also farted slightly more since the EGR plug fell off. Truck gets better and better as the miles increase. 5k to date.