Boost Fluctuation
Thread Starter
|
Senior User
Joined: Jan 2010
Posts: 100
Likes: 0
From: Silver City New Mexico
Boost Fluctuation
The place i work has a fleet of 08 250s and 350s. The one i was driving the other day had boost pressure fluctuation while the DPF was in regen. All the others i have driven never did it. Is this common or is there something they should know. Most of the people that drive these don't know squat about trucks or diesel for that matter. We are the ones that are supposed to write the trucks up for maint if we think is needed. It scares me to think how many of these going down the road probably need something done to them. We are extremely hard on these trucks and some of the 08s with 80K plus run better than the 09 silverardos with only 7k.
Post Fiend
Joined: Jan 2009
Posts: 6,521
Likes: 11
From: Greenwood, SC
During a regen the boost is controlled, kept to a minimum unless engine load is high, like with a heavy trailer.
HP is reduced to 325 also. During regen the engine runs on reduced boost but the power is still there by using fuel. So basically, power is steady but how it makes the power changes.
The fluctuation? Do you mean that it's different during regen than it is normally or do you mean a rapid change like the needle on the gauge is bouncing?
If there is an issue with the EGR valve would it be possible to have exhaust gas flow problems to the turbos?
HP is reduced to 325 also. During regen the engine runs on reduced boost but the power is still there by using fuel. So basically, power is steady but how it makes the power changes.
The fluctuation? Do you mean that it's different during regen than it is normally or do you mean a rapid change like the needle on the gauge is bouncing?
If there is an issue with the EGR valve would it be possible to have exhaust gas flow problems to the turbos?
Super Moderator
Joined: Aug 2008
Posts: 37,383
Likes: 1,867
From: Frederick, MD
I never really notice any loss of boost on mine while in regen and towing combined or empty and in regen.
I tend to agree with ruschejj.
Not all these trucks operate the exact same way, but they are similar in operation.
I tend to agree with ruschejj.
Not all these trucks operate the exact same way, but they are similar in operation.
Thread Starter
|
Senior User
Joined: Jan 2010
Posts: 100
Likes: 0
From: Silver City New Mexico
Cruise was set to 75 on the interstate, when it went into regen the needle on the boost gauge would go up then down to 0, then back up then back down. Didn't feel any type of loss of power during all this either.
Freshman User
Joined: Jan 2008
Posts: 34
Likes: 0
I am glad you posted this, my truck does the same thing. When I go into regen my boost starts to fluctuate 5-7 pounds on the gauge, sometimes dropping all the way down to 0. I dont notice any performance changes but I can definately hear the turbo cycling back and forth. Almost sounds like a waste gate opening and closing which I know we don't have.
Thread
Thread Starter
Forum
Replies
Last Post
Yourguide
1999 - 2016 Super Duty
3
Jun 25, 2017 11:11 PM
nigcar(abbreviation)
6.0L Power Stroke Diesel
30
Jul 14, 2016 10:19 PM
Orangestanger
6.7L Power Stroke Diesel
4
Feb 13, 2015 07:21 AM
mb5518
1983 - 2012 Ranger & B-Series
3
Sep 17, 2014 07:12 AM
1997, 350, 64, 73, 73l, boost, fluctuates, fluctuatioin, fluctuation, flucuates, fluxuation, ford, power, powerstroke, pressure, stroke, turbo
