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mrpicky
Senior Member

123 Posts
Posted - 06/21/2016 :  07:48:30 AM  Show Profile  Visit mrpicky's Homepage  Reply with Quote
Have an 07 BB RE 8.3 that loses power when driving at highway speeds. The RPM doesn't go down but the boost will drop on the turbo 10-15 psi before it catches itself and goes back to normal. What do I need to look at? Sorry, I know this is a noob question. Thanks in advance.

partsman_ba
Administrator

United States
377 Posts
Posted - 06/21/2016 :  10:12:55 AM  Show Profile  Reply with Quote
Any codes? Seems like that kind of hiccup would set something.
"Growing old is mandatory. Growing up is optional."
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mrpicky
Senior Member

123 Posts
Posted - 06/21/2016 :  11:16:00 AM  Show Profile  Visit mrpicky's Homepage  Reply with Quote
Have a code that is inactive 2387 VGT Actuator Driver Circuit.
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RonF
Top Member

867 Posts
Posted - 06/21/2016 :  1:34:12 PM  Show Profile  Reply with Quote
I would start with that code right there. It will be inactive if the problem isn't occurring when you have the diagnostics connected.
US Army retired CMBT
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partsman_ba
Administrator

United States
377 Posts
Posted - 06/21/2016 :  3:22:07 PM  Show Profile  Reply with Quote
Could very well be an air leak on the charge air side - look for a loose clamp. Or a face-plugged DPF. Or a turbo (we've had no luck changing the VGT actuator here...)
"Growing old is mandatory. Growing up is optional."
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mrpicky
Senior Member

123 Posts
Posted - 06/21/2016 :  4:52:12 PM  Show Profile  Visit mrpicky's Homepage  Reply with Quote
Already checked for an air leak at the boots and tubes. Couldn't find one. I will check the DPF for soot plugging the face. Thanks.
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mrpicky
Senior Member

123 Posts
Posted - 06/22/2016 :  08:13:46 AM  Show Profile  Visit mrpicky's Homepage  Reply with Quote
The face of the DOC is pretty well plugged. Going to get it cleaned and see what happens.
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partsman_ba
Administrator

United States
377 Posts
Posted - 06/22/2016 :  11:21:42 AM  Show Profile  Reply with Quote
Yep, next step is to see if the face plugging is the cause or if it's the result of the code disabling regen.
"Growing old is mandatory. Growing up is optional."
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