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NEW! Technical Info: 4th Gen DRIVETRAIN Technical discussion of fourth generation (2007.5 and up) 6.7L engine and drivetrain questions, solutions and upgrades. For trucks with the 5.9L engine use the appropriate 3rd gen forums.
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Old 06-29-2018
streeter streeter is offline
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Default boost?

picked up a new '18 yesterday w/ 68RFE...noticed at hwy speeds 72-75mph & 1500-1700 rpm the factory screen shows virtually zero boost pressure...doesn't seem right is that typical?
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Old 06-29-2018
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Floor it for a minute and see what it reads then.
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Old 06-29-2018
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I don't have any boost pressure at that speed either. The KW shows 20psi boost at that speed.
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Old 07-03-2018
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My '03 usually runs 5ish psi cruising empty.
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Old 07-03-2018
streeter streeter is offline
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my '03 would run 8-12 at hwy speeds and hit 20 climbing grades

this '18 barely hits 10 with my foot in it uphill and runs along at hwy speeds with no visual boost unless, shows a little accelerating from a stop
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Old 07-06-2018
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Quote:
Originally Posted by streeter View Post
my '03 would run 8-12 at hwy speeds and hit 20 climbing grades

this '18 barely hits 10 with my foot in it uphill and runs along at hwy speeds with no visual boost unless, shows a little accelerating from a stop
You have an VGT actuator problem. Probably stuck.
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