Lost boost
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Cargo Master
Joined: Aug 2002
Posts: 2,117
Likes: 8
From: Over Yonder, MN
Lost boost
Yesterday I had a weird thing happen, when climbing a hill I noticed the truck sounded different, like a diesel should really... anyways before I knew it I pretty much had it floored just to maintain speed, so I look down and 0 boost. Pulled over, checked everything and couldn't find anything wrong, so I continued driving and couldn't build a speck of boost. Finally shut it off for about a min and then it was fine. Anyone else have this happen?
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
I've heard of some strange things before, but they most often resolve themselves with a shutdown and restart. Will it build boost now, or is this an ongoing thing?
Could be boot blew off, but if you couldn't find or hear anything amiss you could have lost your turbo.
Could be boot blew off, but if you couldn't find or hear anything amiss you could have lost your turbo.
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 84
I had this happen once after getting fuel.
My best guess is all computer related because I've not had an issue since.
A few others have had the same experience.
Shut it down and restart and all is well. "Rebooting" the truck.
Temps get really hot without the turbo so it took awhile to cool down before I shut it down.
I found out something was wrong when I tried to climb a hill at 65 mph about a mile down the road.
My best guess is all computer related because I've not had an issue since.
A few others have had the same experience.
Shut it down and restart and all is well. "Rebooting" the truck.
Temps get really hot without the turbo so it took awhile to cool down before I shut it down.
I found out something was wrong when I tried to climb a hill at 65 mph about a mile down the road.
Tuned
Joined: Aug 2007
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From: CO Mnts
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Lead Driver
Joined: Nov 2005
Posts: 5,244
Likes: 4,262
From: Kaysville Utah
I would suspect this is an issue with one of the sensors not reading the correct Barometric pressure. Boost is calculated as amount above the current outside reading. If the computer thinks there is no barometric pressure it will reduce the turbos boost to almost nothing.
I had this problem on my 03 6.0L. Would work fine in the valley and when I got up into the mountains and higher elevation, I would have no boost because of the change in pressure in altitude. They replaced a sensor and everything worked fine after that.
Just my guess.
I had this problem on my 03 6.0L. Would work fine in the valley and when I got up into the mountains and higher elevation, I would have no boost because of the change in pressure in altitude. They replaced a sensor and everything worked fine after that.
Just my guess.
Senior User
Joined: Nov 2011
Posts: 306
Likes: 1
From: FLG AZ
Painted, that's interesting because I live at 7000 ft and don't think I've ever seen boost over 20 on my Edge Insight. I was wondering if it was altitude related, that perhaps the boost is cut off earlier at altitude? (Sorry for the hijack).
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
It takes airflow to create boost, which is why non-turbo vehicles suffer so much at altitude. At 7,000 feet you'll see more turbo lag and lower peak boost because there just isn't as much air moving through the cylinders until boost comes up.
Lead Driver
Joined: Jan 2006
Posts: 6,267
Likes: 5
I think the truck should be smart enough to compensate for the altitude, unlike the previous diesels where they'd just smoke a bit more, the 6.4 might be a bit laggy, but it should take the same PSI to make the same HP at sea level.
It wouldn't make sense for it to just run less boost, unless it also is programmed to reduce power at higher elevations, otherwise the DPF would plug up real quick.
my .02$ anyways
