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05-24-2007, 07:46 PM
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eBay Motors
#1 (permalink)
| | Junior Member
Join Date: May 2007 Location: California
Posts: 3
| Loud noise, no power
I have had this intermintent problem since truck was new. GMC Dealer doesn't know what's wrong, says "no codes". Engine will be running fine, then just sounding very loud (like turbo turned off and engine tring to keep up, loss of power, no change in RPM. Happens whether I'm towing 5th wheel or unloaded. Hot or cold.
Mileage goes down. This doesn't happen all the time, but a real shocker when towing uphill. Changed fuel filter at 18,000 miles and last week again, present mileage is 21,400.
Anyone have any thoughts?
__________________
KowboyKen, 05 GMC Sierra 2500HD SLT, 6.6 Duramax w/ Alison. Crew Cab, Short Bed.
Last edited by KowboyKen : 05-25-2007 at 07:06 AM.
Reason: More info
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05-24-2007, 08:27 PM
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eBay Motors
#2 (permalink)
| | Member
Join Date: Feb 2007
Posts: 39
| Try a fuel additive every time you fill up. Yeah I know it sucks but it has helped mine. I use to have the same problem without the noise. Now I use howe's or some other additive with no problems.
__________________
White 05 Duramax 4x4 crew K&N air intake, No kitty, Predator, 4" MBPR 409 exhaust, White gauge cluster, billet grill. Westin all the way around. | |
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05-24-2007, 08:30 PM
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eBay Motors
#3 (permalink)
| | Junior Member
Join Date: May 2007 Location: California
Posts: 3
| Thanks, I'll try.
__________________
KowboyKen, 05 GMC Sierra 2500HD SLT, 6.6 Duramax w/ Alison. Crew Cab, Short Bed. | |
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05-25-2007, 05:21 AM
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eBay Motors
#4 (permalink)
| | Junior Member
Join Date: Feb 2007
Posts: 24
| I am unclear reading your post. You DO or DONOT have a loss of power when this happens?
Does the truck run the same, just loud? | |
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05-25-2007, 09:14 AM
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eBay Motors
#5 (permalink)
| | Junior Member
Join Date: May 2007 Location: California
Posts: 3
| Loss of power
I do have loss of power.
__________________
KowboyKen, 05 GMC Sierra 2500HD SLT, 6.6 Duramax w/ Alison. Crew Cab, Short Bed. | |
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05-25-2007, 11:57 AM
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eBay Motors
#6 (permalink)
| | Super Moderator
Join Date: Aug 2005 Location: Alaska
Posts: 1,654
| I have read where the vanes in the turbo stick...that could cause your problem. I'm not sure how to check it though.
__________________ 2004 GMC 2500HD D/A CC Carbon Metallic w/ LB7
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Clifford 2 way remote start, High Idle, Bilsteins
Extang Classic Platinum Tonneau Cover
AFE Magnum Force Stage 2 Proguard 7 intake Kennedy Diesel Merchant Automotive My Photos | |
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05-25-2007, 04:13 PM
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eBay Motors
#7 (permalink)
| | Junior Member
Join Date: Feb 2007
Posts: 24
| It could be blowing the EGR open. | |
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