6.7 Turbo Lag
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6.7 Turbo Lag
So I just moved up to 7000' elevation from sea level and I notice that when my truck is started for the first time in the morning, I don't have much to any turbo for at least 5 minutes. I assume this is due to the elevation but I'm not sure. Has anyone else experienced this phenomenon? If so is there a simple solution besides letting the truck run in the driveway for 5-10 minutes before driving. When I pull out of my neighborhood, its onto a busy street so I kinda need that get up and go.
Thanks, Im new here.
Scott
Thanks, Im new here.
Scott
Cargo Master
Joined: Feb 2015
Posts: 2,338
Likes: 255
From: Livermore Ca.
It may have something to0 do with the temperature. It may be the computer is limiting boost till the engine gets some heat in it. . Do you have absolutely 0 boost for 5 to 10 minuets? Depending on the year of your truck the waste gate could be bad. I am just guessing here.
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New User
Joined: Sep 2020
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It may have something to0 do with the temperature. It may be the computer is limiting boost till the engine gets some heat in it. . Do you have absolutely 0 boost for 5 to 10 minuets? Depending on the year of your truck the waste gate could be bad. I am just guessing here.
Fleet Mechanic
Joined: Nov 2005
Posts: 1,508
Likes: 87
From: North Carolina, Raleigh
when you start do you let it idle for a min or so or just start put in gear and go?? on my 03 7.3 in cool to cold especially morning I try to start and let it sit idling for a min or so and NO hard acceleration for the first 5 mins or so. that might help now with the cooler climate you get at 7K especially in winter.
depending on your current oil the 15-40 might be a bit thick.. maybe the 5-40 to try..
depending on your current oil the 15-40 might be a bit thick.. maybe the 5-40 to try..
Fleet Mechanic
Joined: Feb 2007
Posts: 1,652
Likes: 79
From: Mooresville, NC
Turbo lag is pretty much evident on ALL turbocharger equipped vehicles -- light weight low mass turbines help reduce lag, but it's still there.
Absent codes, I'd say it's behaving as designed for cold ambient warm-up (i.e. VGT Closed - pushes exhaust gases across the vanes of that turbo, increases exhaust pressures in the exhaust manifold and into the intake)
You'd get codes, other issues if that VGT actuator, other components were faulty.
BARO, air temp, etc are inputs into the PCM and again (not sure of your year or on-board diagnostics - there are changes across model years) the underboost, overboost (closed loop monitors) typically flag issues so you'd (hopefully) get error codes.
Absent codes, I'd say it's behaving as designed for cold ambient warm-up (i.e. VGT Closed - pushes exhaust gases across the vanes of that turbo, increases exhaust pressures in the exhaust manifold and into the intake)
You'd get codes, other issues if that VGT actuator, other components were faulty.
BARO, air temp, etc are inputs into the PCM and again (not sure of your year or on-board diagnostics - there are changes across model years) the underboost, overboost (closed loop monitors) typically flag issues so you'd (hopefully) get error codes.
Thread Starter
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New User
Joined: Sep 2020
Posts: 8
Likes: 0
Turbo lag is pretty much evident on ALL turbocharger equipped vehicles -- light weight low mass turbines help reduce lag, but it's still there.
Absent codes, I'd say it's behaving as designed for cold ambient warm-up (i.e. VGT Closed - pushes exhaust gases across the vanes of that turbo, increases exhaust pressures in the exhaust manifold and into the intake)
You'd get codes, other issues if that VGT actuator, other components were faulty.
BARO, air temp, etc are inputs into the PCM and again (not sure of your year or on-board diagnostics - there are changes across model years) the underboost, overboost (closed loop monitors) typically flag issues so you'd (hopefully) get error codes.
Absent codes, I'd say it's behaving as designed for cold ambient warm-up (i.e. VGT Closed - pushes exhaust gases across the vanes of that turbo, increases exhaust pressures in the exhaust manifold and into the intake)
You'd get codes, other issues if that VGT actuator, other components were faulty.
BARO, air temp, etc are inputs into the PCM and again (not sure of your year or on-board diagnostics - there are changes across model years) the underboost, overboost (closed loop monitors) typically flag issues so you'd (hopefully) get error codes.
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Hotshot
Joined: Oct 2015
Posts: 19,693
Likes: 12,818
From: Wyoming
I live at 6000' elevation. I do not idle mine after starting. I get in, start it and go. I don't notice any more turbo lag after initial start than during normal operation. Then again, I am pretty easy on the accelerator all the time. I run 5w-40 engine oil.
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