Turbo question
Thread Starter
|
Freshman User
Joined: Jan 2012
Posts: 30
Likes: 0
Turbo question
I have an 08 f250. When I'm driving I'll get a small hiss when the truck shifts gears for about a split second except for when it shifts into 5th gear it will do it for a second maybe two. It's not loud but I'm almost out of warranty and just want to make sure it's normal. The previous owner had a manifold gasket replaced and I had the crossover pipe seals replaced as well. It did it when I bought it and it still does it. Running completely stock.
Posting Guru
Joined: Sep 2010
Posts: 2,213
Likes: 1
From: The Woodlands, TX
Well, I'm going to start with let's see if you have a stock downpipe? Unless someone else chimes in. From under the truck follow the exhaust up into the engine bay, the curved pipe coming down from the turbos, can you tell if it has a huge crimp about 6-8" up? Is there a clamp up about 8-10"?
Thread Starter
|
Freshman User
Joined: Jan 2012
Posts: 30
Likes: 0
Trending Topics
Posting Guru
Joined: Sep 2010
Posts: 2,213
Likes: 1
From: The Woodlands, TX
I'd check the downpipe when you get a chance just as elimination. The stock one has to be cut out, so if it was changed, it likely wasn't changed back.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
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
Posting Guru
Joined: Sep 2010
Posts: 2,213
Likes: 1
From: The Woodlands, TX
I didnt ever notice that sound before or through the addition of my mods. The DP was the only change to my rig before I noticed it. Hopefully someone else will chime in and give us direction. Sorry I couldn't be more helpful.
Posting Guru
Joined: Sep 2010
Posts: 2,213
Likes: 1
From: The Woodlands, TX
Ok, I've found a couple posts on it and I've concluded it's normal. It's Due to a build up of boost during acceleration and when the truck shifts, RPM's drop and that pressure has to be released. One site referred to it as "Turbo Bark" dating all the way back to 7.3's. Both stock and modified trucks are in question. I'm just not sure why I didn't ever notice it before.
Lead Driver
Joined: Jan 2006
Posts: 6,267
Likes: 5
On the 6.4, less intake restriction = less turbo "bark" or fluctuations, whatever you want to call it.
I know this because when my AFE intake boot disintegrated, the turbo was directly open to atmosphere, and it didn't make those sounds as it did with the stock air intake.
I know this because when my AFE intake boot disintegrated, the turbo was directly open to atmosphere, and it didn't make those sounds as it did with the stock air intake.