No Boost - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 8 (permalink) Old 01-14-2009, 11:13 PM Thread Starter
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No Boost

Does anyone know why a 6.4L would not build boost?

As I was driving home from work today, I noticed that my truck would not hold a consistant boost pressure. It seemed as though the small turbo would build up to about 10psi but then the larger turbo would not kick in and the boost would drop to 0psi. I noticed this while driving about 60mph after I had been sitting in stop-and-go traffic for about a half an hour. While I observed this, I went through the system check in the message center and it said that the exhaust filter was being cleaned.

However after shutting off the truck and running into the bank the problem seemed to go away.
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post #2 of 8 (permalink) Old 01-14-2009, 11:23 PM
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that is normal, everytime it goes into a regen you will notice that, its limiting the air so it can raise the egt's so its hot enough to burn the soot off. also if you got a new flash if you push it hard enough the boost will build but then fall right back off if you let go. its all normal. Also when you shut the truck off and started it again then it would not be in a regen for alittle while till it plugged the filter off enough to call for one again.

Last edited by budtoh3zo; 01-14-2009 at 11:30 PM. Reason: more info
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post #3 of 8 (permalink) Old 01-14-2009, 11:24 PM
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did you check the intercooler boots?

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post #4 of 8 (permalink) Old 01-15-2009, 12:54 AM Thread Starter
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Thanks,

I figured it had something to do with the regen, but this is the first time this happened with 2000mi on the truck. Could the below freezing temperatures account for this situation?
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post #5 of 8 (permalink) Old 01-15-2009, 01:07 AM
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have you being idleing lots? it could be a more aggressive regen then your used to if its more plugged off. With mine since i do lots of idleing around with work if it gets plugged off bad enough it will start to regen as soon as i take it out of park.
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post #6 of 8 (permalink) Old 01-18-2009, 09:15 PM Thread Starter
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I have been idling quit a bit with this cold weather.

This happened to me again today (500mi later) except this time, "Drive to clean exhaust system" popped up in the message center. How exactly do you drive to clean the exhaust?
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post #7 of 8 (permalink) Old 01-18-2009, 10:07 PM
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You just drive atleast 30 mph to clean it it takes about 20 min of driving.

Last edited by budtoh3zo; 01-18-2009 at 10:09 PM.
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post #8 of 8 (permalink) Old 01-19-2009, 05:26 PM
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delete that stupid EPA mandated hunk of scrap metal.... www.spartan.com

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