Turbo question
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More Turbo
Joined: Jan 2011
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Turbo question
I have a 06 with 220k miles on her and we pulled a 30' RV this weekend about 7-8k lbs. Truck runs fine and pulls hard. It will pull a hill or freeway and I notice the turbo will build to 25+ and then will drop to 5 or so. then it will slowly build back up. It seems to do it only at hard accels. If I keep the boost down it doesnt do it.
When not towing it will not do it. Any ideas?
When not towing it will not do it. Any ideas?
Mountain Pass
Joined: Apr 2010
Posts: 170
Likes: 1
I have a 06 with 220k miles on her and we pulled a 30' RV this weekend about 7-8k lbs. Truck runs fine and pulls hard. It will pull a hill or freeway and I notice the turbo will build to 25+ and then will drop to 5 or so. then it will slowly build back up. It seems to do it only at hard accels. If I keep the boost down it doesnt do it.
When not towing it will not do it. Any ideas?
When not towing it will not do it. Any ideas?
IIRC the VGT Solenoid is contolled by the PCM which uses the Mass Fuel Desired (throttle positions) and EBP sensor.
I am sure the Tow/Haul mode has some control of the turbo but to what extent I am not sure.
Do you have a scangauge that you can monitor VGT duty cycle.
For me once a year I pull the EBP sensor and sensing line and clean the carbon deposits.
Hope some of this helps.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
I don't think you have a problem, but check Map, Baro, and EBP at KOEO, idle, and 2500 rpm's (not under load) on STOCK programming since a tune can give "false" boost readings. See if the boost responds the same way with a stock tune. I really think it's just the turbo responding to increased load conditions induced by pulling the trailer.
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