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Old 09-08-2013, 08:10 AM
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Turbo question

I have a 2008 6.4 with approx. 88k miles on it. I have only owned since 72k miles. We had an ultralite bumper pull trailer until about 5 months ago and now have a 13k 5th wheel. I noticed this year that i couldn't pull any hills in Arizona headed to the white mountains without the ect going through the roof. I since have had the radiator replaced and that seems to have fixed that issue.

Now to my question. We recently pulled the 5th to SW Colorado for a few days. Serious climbs up to 10.5k and really had no issues with the truck. (trailer different story, return home had to put new tires on) What I did notice is that the turbo guage seems to stay at 20 psi unless i completely take my foot off the gas pedal. I got about 7.5 mpg on the way there and had exhaust clean twice on the 640 mile trip.

I am wondering if I should take to dealer and complain about the turbo or if that is normal. I have an extended warranty that should cover.

thanks.
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Old 09-09-2013, 06:09 PM
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What's your EOT temp?

Wondering if Oil cooler is plugged or something.
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Old 09-10-2013, 07:01 PM
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eot is 15 or less above the ect which from what i understand is acceptable?
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Old 09-11-2013, 06:22 AM
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Quote:
Originally Posted by glraz View Post
eot is 15 or less above the ect which from what i understand is acceptable?
Correct. Can you post your temps? What is the max difference you see?
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Old 09-11-2013, 06:31 AM
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How does ect affect Turbo Boost?

To the OP, when I pull my 7500 lb TT my boost stays around 10-20 PSI, even on the flats. I think that part is normal, at least I hope
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Old 09-11-2013, 06:35 AM
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Oh another thing I would do is take off the map sensor, ebp sensor and tube and clean them really well. That will affect turbo boost.
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Old 09-11-2013, 09:15 AM
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Those boost numbers are normal. Your pulling a great big heavy wind brake so your drivetrain is under load constantly, until you go down hill. Getting rid of that DPF and buying a "race" tuner will help a little with improving your fuel consumption.
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Old 09-11-2013, 10:17 AM
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The max diff I saw was 16 with a high being around 230's when I was really pulling . Ect never went above 220. Once it hit 220 the fan kicked in and cooled it down.

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