Page 1 of 3 123 LastLast
Results 1 to 10 of 22
  1. #1
    Silver Member
    Join Date
    Jun 2003
    Posts
    169
    Location
    SE Nebraska
    Tractor
    Massey Ferguson 1225 hydro w/ westendorf loader.

    Default Chevy pickup problem

    Any Chevy techs here that can help me out?
    I have a 2005 K1500 with 5.3L V8. (code T if that matters)
    A while back, I had the check engine light coming on under hard acceleration.
    I scanned for codes and got a code for MAF problem (101 I think). I checked for air leaks, cleaned the MAF and cleaned the K/N filter. Still had the light, so I replaced the MAF. That took care of the light coming on under acceleration.
    However- A few days later, the light came on again while sitting at a red light idling. Re-scanned and now shows code 171 and 174 for lean on left and right. After reading some Chevy forums, it sounded like an intake gasket leak might be the problem. I did the carb cleaner test up and down the intake and didn't find anything.
    Given this information, are the upstream oxygen sensors the likely culprit now?

    Thanks!

    Todd

  2. #2
    Elite Member WilliamBos's Avatar
    Join Date
    May 2004
    Posts
    4,598
    Location
    Innisfil, Ontario, Canada
    Tractor
    MF 1635 12x12 Powershuttle

    Default Re: Chevy pickup problem

    What does the exhaust look like?? Smoking black? Is the mileage terrible??

    Lost sensor 1, Bank 1 (front oxygen sensor, drivers side.) and it took the Cat out with it. Got a new Y-Pipe covered by Federal Emissions warranty, via GM.

    Maybe get it to a dealer, and have the diagnostic done, just state you want a print out, and no repair done. That Y pipe was $1K.

    Mine is an 04, same VIN code 5.3L.
    Thanks,

    Will


    I do not care if someone's net nanny is watching!! You need to stop...

  3. #3
    Silver Member
    Join Date
    Jun 2003
    Posts
    169
    Location
    SE Nebraska
    Tractor
    Massey Ferguson 1225 hydro w/ westendorf loader.

    Default Re: Chevy pickup problem

    I haven't noticed any black exhaust. Mileage may be down a little, but not much (1 MPG +/-) . Seems to run OK also.

  4. #4
    Elite Member WilliamBos's Avatar
    Join Date
    May 2004
    Posts
    4,598
    Location
    Innisfil, Ontario, Canada
    Tractor
    MF 1635 12x12 Powershuttle

    Default Re: Chevy pickup problem

    ok. When I lost sensor1, it was dumping raw gas into the cat, smoking like an old diesel, and burnt the cat out.

    A tank of gas did not last too long.
    Thanks,

    Will


    I do not care if someone's net nanny is watching!! You need to stop...

  5. #5
    Elite Member Dmace's Avatar
    Join Date
    Oct 2005
    Posts
    3,838
    Location
    Wakefield, NH
    Tractor
    Kioti CK20 HST

    Default Re: Chevy pickup problem

    O2 sensors rarely go at the same time like that and if they did, you would see a code for at least one.

    Since both sensors are reading a lean condition then the problem is something that affects the engine on both banks. I think it's still a MAF sensor or intake leak. I've received bad MAF and other electrical parts from stores before.

    If you have the old MAF, plug it in and see if you get the same symptoms as before. When is the last time you cleaned the K&N? Is it possible you over-oiled it?
    Derek
    Kioti CK20HST
    KL120 FEL // KB2365 BH // 60" JRW 3ph snowblower // 48" HD Boxblade
    Sims-Cab Depot heated cab
    Quote Originally Posted by DiamondPilot
    Now it's time for Ford and GM to step up

  6. #6
    Elite Member WilliamBos's Avatar
    Join Date
    May 2004
    Posts
    4,598
    Location
    Innisfil, Ontario, Canada
    Tractor
    MF 1635 12x12 Powershuttle

    Default Re: Chevy pickup problem

    To add what Derek suggested, if you have the factory airbox and filter, put it back in, until you resolve the issue.
    Last edited by WilliamBos; 01-08-2012 at 08:07 PM.
    Thanks,

    Will


    I do not care if someone's net nanny is watching!! You need to stop...

  7. #7
    Super Star Member Diamondpilot's Avatar
    Join Date
    Jan 2007
    Posts
    15,272
    Location
    Daleville, IN
    Tractor
    Jinma 254/284 Ford 861 Powermaster at work

    Default

    I saw this on a V8 Lincoln Aviator. Ended up being a combination of a bad PCV valve hose and a bad hose going from the break booster to the intake.

    Chris

  8. #8
    Silver Member
    Join Date
    Aug 2004
    Posts
    114
    Location
    Jacksonville, FL

    Default Re: Chevy pickup problem

    My guess is the intake gasket. I had my engine light come on every winter because of the cold. Replacing it is not that bad. Or you can just wait until the summer, and it will go off
    2003 John Deere 4310 HST and 430 Loader
    2005 F350 SRW V10 - Towing Machine

  9. #9
    Silver Member
    Join Date
    Mar 2010
    Posts
    127

    Default Re: Chevy pickup problem

    You might look up Technical Service Bulletins for that. I remember seeing several on aftermarket oiled filters.

    Also, throttle body butterflies can get regularly gummed up and wont close completely causing and air reading problem. Believe there to be a TSB for that also.

  10. #10
    Platinum Member
    Join Date
    Jul 2011
    Posts
    693
    Location
    Mabank Texas
    Tractor
    Mahindra 4025

    Default

    I had one of those codes showing maf, and it was my fuel pump. We put a pressure gauge on the fuel line and it wasn't getting enough fuel.

Page 1 of 3 123 LastLast

Similar Threads

  1. B2400 starting problem finally solved
    By victor43 in forum Kubota Owning/Operating
    Replies: 49
    Last Post: 06-14-2015, 06:41 PM
  2. Boomer Problems
    By froggy in forum New Holland Owning/Operating
    Replies: 29
    Last Post: 03-21-2014, 02:29 PM
  3. Power Steering Problem Not Solved
    By Alan L. in forum Kubota Owning/Operating
    Replies: 87
    Last Post: 03-31-2011, 06:35 PM
  4. KL130 on a CK30 Problem
    By tierbb in forum Kioti Owning/Operating
    Replies: 74
    Last Post: 11-20-2007, 03:06 PM
  5. B2400 Starting Problem
    By victor42 in forum Kubota Owning/Operating
    Replies: 7
    Last Post: 06-03-2004, 07:13 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.