K&N filter causing reduced power - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Lounge (0) Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > Duramax Fourth Generation: 2007.5-2010 (LMM)
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Auto EscrowAuto LoansInsurance

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 12-23-2012, 08:08 PM   #1 (permalink)
hughjordan
Diesel Enthusiast
 
Join Date: Jan 2010
Posts: 4
iTrader Score: 0 reviews

K&N filter causing reduced power

Hello. I recently installed an oiled K&N filter in the stock air intake in my 2007 lmm. The truck has no mods, no programmer, etc. The filter is seated good and tight and appears to be fine.

After driving for a day or two, the reduced engine power warning will appear. The truck doesn't lose power, appears to run normal. The engine light will remain on, but no more REP warning. When I switch back to the stock filter, the engine light will go out after a couple of days or so many engine starts, and everything is back to normal. I have tried this twice and it is the exact same result.

Any idea what could be causing the K&N filter to throw the REP warning light on?

Thanks
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-23-2012, 08:45 PM   #2 (permalink)
Bartman432
Diesel Master
 
Bartman432's Avatar
 
Join Date: Jun 2007
Location: Upland, California
Posts: 2,180
iTrader Score: 0 reviews

Those K&N filters and their air intake kits are notorious for messing up the Mass Airflow Sensors. Maybe residue from the oiled filter is getting on the MAS.
__________________
Truck: Bought new 2007.5 LMM 2WD Chevy Silverado LT, ORU leveling kit & Bilstein shocks, PPE HID's 5000K, 2012 cab lights
Motor Mods: PPE Hot+2 tuner, PPE ported fuel rail fitting, Banks air intake/filter & super scoop, Banks boost tube, Air Dog II 165 LP, EGR blocked, 5" Flo-Pro DPF back exhaust, PPE Centrifuge, Superflow Dyno @ Westech Performance Group (522hp & 956lbs. torque Hot+2 Race) with DPF & CAT 506hp & 925lbs.torque (Smog Legal once again)
Trans: Stage 3 built by Mike L. (Inglewood Transmissions), with Suncoast 1057 TC, PPE pan, Upgraded trans lines.
Rearend: Re-Geared with 4:10 and Chrysler posi unit, Mag-Hytec cover, Firestone airbags.
Tires & Wheels: 2012 GMC factory 18" with Michelin 265/70R18 LTX A/T 2 with 1.5" adapters by Motor City Bolt On
Interior: PPE EGT, Boost and Fuel rail pressure guages, Pioneer DVD HU, Components, Pioneer 10" TS-SWX251 flat sub, (2) Alpine amps.1988-1992 USMC, 3RD AABN, Desert Storm/Shield Vet
Offline   Reply With Quote Quick reply to this message
Old 12-23-2012, 08:51 PM   #3 (permalink)
LETHAL WEAPON
Diesel Master
 
LETHAL WEAPON's Avatar
 
Join Date: Nov 2008
Location: Temple Hills Md
Posts: 2,109
iTrader Score: 1 reviews

DelMarVa Diesel Club Member

Do some searching on k&n filters on dmax engines.......not a very good combination
__________________
Dave
2008 3500 HD DUALLY 4WD SLE 420 HP/855TQ 6.6 LMM D-MAX,4inch Turbo back straight pipe into 7 stacks,Modified Allison 6 speed done by suncoast, EFI LIVE & DSP5 Switch,DPF,DOC,EGR delete ,PVC re-route,Filtration F.A.S.S. w/Donaldson P551313 & water seperator ,Niketane filter adapter w/Cat filter 1R-0750 /Wheels 22.5 ALCOA's wraped on Michelins 255/70/22.5 Window Tint 5% on all windows 55% on windsheild,Gauges... Boost,Fuel PSI,Differential &EGT and EDGE CTS monitor,Nathan K3LA & K5LA Train horns....Blue L.E.D. underbody lights, CODE 3 Siren/P.A. system, BLIZZARD 9' Snow plowMAG-HYTEC differential cover , Alligator Performance tranny lines, Banks ram air w/super scoop, Coolant filtration kit,Merchant Automotive motor mounts
My rumble tune...NO DAM HISS AT IDLEhttp://www.youtube.com/watch?v=qCcrFAouxB0
Listen too the MAX http://www.youtube.com/watch?v=9VTXyUxnZmU
Back-up truck>>>> 2002 Chevy Silverado Generation III 5.3L z71 130k+ miles
Offline   Reply With Quote Quick reply to this message
Old 12-23-2012, 09:02 PM   #4 (permalink)
Bowhunter79
Diesel Enthusiast
 
Join Date: Dec 2012
Posts: 1
iTrader Score: 0 reviews

The oil from the K&N will cause the Mass Air Flow sensor to go bad. It causes build up in the sensor and causes the light to come on.
Offline   Reply With Quote Quick reply to this message
Old 12-24-2012, 06:48 AM   #5 (permalink)
Dmax 5th Wheel
Diesel Master
 
Dmax 5th Wheel's Avatar
 
Join Date: Feb 2011
Location: Tiki Motel RM #9
Posts: 1,402
iTrader Score: 0 reviews

Stick with the stock filter & problem solved.
__________________
2009 LMM GMC 2500HD SLE CC/SB 4x4
EFI Live, Edge Insight CTS, EGR disabled, Flo~Pro 4" exhaust w/muffler & stock trumpet tip, Pacer LED NBS cab lights, Putco yellow bulb fog lights, GM dually light bar, Cobra 29 WXNWST CB radio, Footwell lights, Kenwood speakers, Tinted windows, GM chrome oval running boards, Fumoto oil drain valve, Bilstein 5100 shocks, Michelin M/S2, PY0 wheels, Rubber mud flaps, Curt class IV hitch, Wilson 2000 CB antenna

2000 Silverado 1500 LS RC/LB 4x2 stock. (Whoopty/Work Truck)
Offline   Reply With Quote Quick reply to this message
Old 12-24-2012, 06:56 AM   #6 (permalink)
rocknrods
Diesel Technician
 
rocknrods's Avatar
 
Join Date: Dec 2012
Location: Hico, TX (once home to Billy the Kid)
Posts: 248
iTrader Score: 0 reviews

Armed Forces Club Member

Lone Star Diesels Member

I have read that K&N cause issues on these trucks also.
__________________
2009 2500HD 6.6 LTZ Z71
Master Chief, US Navy, Retired
My Garage Pics
Advent OGM1 Nav/DVD/CD system with BU cam, Spray in bed-liner, UnderCover bed cover, Bestop Power Steps and Tailgate Step, Full tint windows, Weathertech floor liners, Wheel Well Fuel Filter Access Cover, Nicktain Pre-filter and Cat engine fuel Filter Adapter, Michelin LTX M/S2's, Idaho Rob's EFI Live, DPF Delete Pipe, Firestone Ride-Ride Air Bags, Roof Clearance Lights. Undercover Swing Cases in the bed, Air Werkz On-Board Air system.
Am fear nach gleidh na h-airm san t-sith, cha bhi iad aige 'n am a' chogaidh
Offline   Reply With Quote Quick reply to this message
Old 12-24-2012, 07:01 AM   #7 (permalink)
walkwavy
Diesel Fanatic
 
Join Date: Aug 2008
Location: SE Minnesota
Posts: 57
iTrader Score: 0 reviews

Been there - done that. 1st GM has a service bulletin not to use any filter other than their own and they name K & N as not to use. 2nd K & N has a notice not to use their filter unless you do the entire air intake system. K & N returned my money for the filter.
Oil from the filter getting on the sensor is one of many stories. The actually problem per GM and K & N is that too much air is coming into the engine. Both their stories - not mine. Buy a G M filter is the solution.
Offline   Reply With Quote Quick reply to this message
Old 12-24-2012, 08:01 AM   #8 (permalink)
hughjordan
Diesel Enthusiast
 
Join Date: Jan 2010
Posts: 4
iTrader Score: 0 reviews

Thanks for the reponses. I'll try returning the filter and see where that goes...no moar K&N anything.
Offline   Reply With Quote Quick reply to this message
Old 01-13-2013, 02:57 PM   #9 (permalink)
rudy fontana
Diesel Technician
 
Join Date: Oct 2004
Location: Fontana, CA
Posts: 405
iTrader Score: 0 reviews

I had the same issue. Got mine at Autozone after the representative recommended it. I went on a trip towing my toy hauler and the check engine light came on. I had my diagnostic tool in the truck and ran the code and it was the mass air flow. I had to reset the code everytime it went off or it would go into reduced power mode. I took it back to Autozone and they tried to blame the issue on me. I advised them that I never had a single issue with the stock filter before using the K&N. After some haggling they refunded my money. I put the stock filter back in and no issues since.
__________________
2008 GMC Sierra, Crew Cab, Black, Rhino Liner, Alpine LCD Drop Down DVD, Fumoto Valve, Viair Heavy Duty Onboard Air, Recon Backup Lights, Arnott Air Bags.
Offline   Reply With Quote Quick reply to this message
Old 01-13-2013, 08:37 PM   #10 (permalink)
Duramax-LMM
Diesel Specialist
 
Duramax-LMM's Avatar
 
Join Date: Apr 2009
Posts: 964
iTrader Score: 1 reviews

Quote:
Originally Posted by hughjordan View Post
K&N filter causing reduced power
__________________
2007.5 GMC 2500HD.
Bilstein Shocks / Banks muffler delete tailpipe.
DashHawk + EGT Probe + Edge Dashpod.
Michilen LTX MS2 / Leer 700 Hard tonneau.
Katzkin Leather / WeatherTech floormats.
Fuel Filter Service Door / Aluminum bleeder screw.

Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
LMM: Reduced power/change fuel filter woodrow611 Duramax Fourth Generation: 2007.5-2010 (LMM) 14 06-05-2013 03:21 AM
K&N filter caused reduced power whittaker727 Duramax Fourth Generation: 2007.5-2010 (LMM) 8 07-23-2010 11:14 PM
"Engine power reduced" and "change fuel filter" at the same time. DUG71 Duramax Fourth Generation: 2007.5-2010 (LMM) 26 02-24-2009 03:51 AM
Reduced power/Change fuel filter SpitzoMT Duramax Fourth Generation: 2007.5-2010 (LMM) 8 01-29-2009 07:50 PM
K&N Filter charger causing power loss in 6.0 Kurt W. GM Gassers 7 01-16-2005 08:22 PM


All times are GMT -4. The time now is 07:23 AM.


Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide

SEO by vBSEO 3.6.0