2014 cummins random boost loss - Dodge Cummins Diesel Forum
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post #1 of 5 (permalink) Old 07-06-2019, 08:50 PM Thread Starter
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2014 cummins random boost loss

Bear with me here as i'm currently on vacation, driving and towing with the truck.
truck is a 2014 cummins, 40,000 miles, mods in sig.
long story short i performed maintenance on the truck before heading out with the trailer on vacation. (oil change, air filter, etc...) I also changed to a new set of tunes sent to me from CTT/HPP.
Truck runs fine and shifts great but will randomly drop to ZERO boost. This happens at different boost levels from say 15psi up to 36psi+. No codes, no CEL, no smoke, and you'll drive for a bit, boost will come back but then fall to ZERO the next time you get a good load on it.
The truck will create and hold 36+ psi with NO trailer but if i push it hard enough (i.e- foot to the floor maintaining max boost for an extended amount of time) it will drop to 0psi unloaded as well, again, no codes/CEL's, no smoke.
i'm goint to flash back to my previous set of tunes and see if it still happens but was wondering if anyone had anything else i should check out as well? PID's to monitor, sensors to check, etc...
appreciate the help!


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post #2 of 5 (permalink) Old 07-06-2019, 09:33 PM
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You'd have to be a good looking woman before I'd "bare" with you...

As to your truck issue, your first thought of going back to a previous tune when you didn't have this issue is the thing to do. It sounds like the ecm is losing comm with the turbo control module, when it loses boost does the exhaust brake still work, or do you even still have the stock style turbo?

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post #3 of 5 (permalink) Old 07-06-2019, 09:45 PM
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He has compounds. Does not say what they are though.

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post #4 of 5 (permalink) Old 07-06-2019, 10:21 PM Thread Starter
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Quote:
Originally Posted by Ltngdrvr View Post
You'd have to be a good looking woman before I'd "bare" with you...

As to your truck issue, your first thought of going back to a previous tune when you didn't have this issue is the thing to do. It sounds like the ecm is losing comm with the turbo control module, when it loses boost does the exhaust brake still work, or do you even still have the stock style turbo?
sorry the compound set up is the hardway performance kit retaining the factory turbo/exhaust brake. When i lose boost, i also lose the exhaust braking as well.

2014 granite crystal laramie 4x4 3500 CC SRW thuren coils/shocks, Edge CTS, EfI live by HPP, 4" TBE, EGR & cooler delete, grid heater delete and relocate by GDP, GDP Horn, REVMAX 550, DDP injectors, COMPOUNDS!
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post #5 of 5 (permalink) Old 07-06-2019, 10:34 PM
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Quote:
Originally Posted by Jayrad313 View Post
sorry the compound set up is the hardway performance kit retaining the factory turbo/exhaust brake. When i lose boost, i also lose the exhaust braking as well.
Then my thought of the actuator module not working is backed up by the fact that the EB is also not working.

So, either the ecm is losing comm with the module, or the module went belly up.

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