Engine power loss - Chevy and GMC Duramax Diesel Forum
07.5-2010 LMM Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 06-08-2009, 05:49 PM   eBay Motors  #1 (permalink)
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Engine power loss

How do you know when engine power is reduced?
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In pro car wear led/carbon tail lights and led 3rd brake
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Old 06-08-2009, 06:03 PM   eBay Motors  #2 (permalink)
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You can't go as fast?
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Old 06-08-2009, 06:15 PM   eBay Motors  #3 (permalink)
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LOL!!!! I like smiley face...Yep...I was having alot of that not being able to go fast,real sluggish...
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2008 Duramax Silverado
EFI from ATP
AFE Dpf delete
Banks Dpf back exhaust
Westen bull bar and nerf bars
RCD 6" lift with MT ATZ's 325/60 at's and 18-9.5" pro comp rims
6000k Hid 55 watt lows
Transgo Jr
PPE shim kit
Auto Meter Cobalt pyro and boost
In pro car wear led/carbon tail lights and led 3rd brake
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Old 06-08-2009, 06:28 PM   eBay Motors  #4 (permalink)
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Any DPF messages?
When did you change your fuel filter last?
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Old 06-08-2009, 07:06 PM   eBay Motors  #5 (permalink)
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There are no DPF messages. Fuel filter was changed about 2 months ago with right around 66% life remaining.
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2008 Duramax Silverado
EFI from ATP
AFE Dpf delete
Banks Dpf back exhaust
Westen bull bar and nerf bars
RCD 6" lift with MT ATZ's 325/60 at's and 18-9.5" pro comp rims
6000k Hid 55 watt lows
Transgo Jr
PPE shim kit
Auto Meter Cobalt pyro and boost
In pro car wear led/carbon tail lights and led 3rd brake
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Old 06-08-2009, 07:08 PM   eBay Motors  #6 (permalink)
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Check your airfilter. If it is not getting enough air, it will feel sluggish off the start. When was the last time you changed your tranny filter?
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Old 06-08-2009, 08:08 PM   eBay Motors  #7 (permalink)
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I checked the air filter about a week to two weeks ago and it did look a little dirty but did not clean,so I will try cleaning it now...As far as the tranny filter,that was changed about a couple months ago.
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2008 Duramax Silverado
EFI from ATP
AFE Dpf delete
Banks Dpf back exhaust
Westen bull bar and nerf bars
RCD 6" lift with MT ATZ's 325/60 at's and 18-9.5" pro comp rims
6000k Hid 55 watt lows
Transgo Jr
PPE shim kit
Auto Meter Cobalt pyro and boost
In pro car wear led/carbon tail lights and led 3rd brake
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Old 06-09-2009, 05:44 AM   eBay Motors  #8 (permalink)
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May be the KN filter. The tire size dropped your torque way down also.
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Old 06-09-2009, 06:30 AM   eBay Motors  #9 (permalink)
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Usually on the DIC it will show you a message saying "Engine Power Reduced". Thats how you'll know for sure. If it just feels sluggish, like KB said, the K&N filter could be gumming up the MAF sensor, that in combination with bigger tires can make it feel awfully sluggish.
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