Results 1 to 5 of 5

Thread: P0171 after intake install

  1. #1
    Lifetime Member
    Join Date
    Jan 2012
    Posts
    213

    Default P0171 after intake install

    I have a 2011 Cadillac Escalade that I installed a intake tube and filter a few days ago and now I'm getting a p0171 lean condition. I have verified that there are no leaks and the maf sensor is clean. I did notice that at idle the LTFT was 23-25% at idle but would drop to around 10-13% in park at around 1300-1500rpm. Is there an airflow or fueling table I can adjust to get it closer to where it needs to be so I can drive it. Right now all I've adjusted in the tune was spark, dfco and some afm settings. I'm installing a vvt cam, headers and a wideband next month and will be able to dial in the tune better then. Just need it back to being driveable. Thanks

    Old setup
    2001 GMC Sierra C3, 6.0L, AWD, pacesetter LT, ORY, dmax 4" exhaust and 14" magnaflow, 05 e-fans, NNBS intake manifold, K&N intake, Comp Ls-R 227/235 .614/.621 113LSA, WCCH P&P heads. Procharged with a D1-sc.
    2001 GMC Sierra CK1500 C3: 12.020 @ 111.580 MPH
    New Setup: 5.3L, 80E with HD2 shift kit, stock converter, NNBS intake mani, Pacesetter LT, ORY and 4" exhaust.

  2. #2
    Lifetime Member
    Join Date
    Mar 2006
    Posts
    4,792

    Default

    Need to tune the MAF and/or VVE tables most likely, showing that lean on LTFTs is why the code is being set. No "master" table, you'll need to tune the airflow. If you're planning to do all of those other mods soon, easiest thing would be to put the stock setup back on and tune it all in a few weeks.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  3. #3
    Lifetime Member
    Join Date
    Jan 2012
    Posts
    213

    Default

    Thank you. It did end up having a vaccum leak from the hose that goes to the passenger side valve cover.

    But it all may end up getting replaced soon as I had gotten the okay to adding a turbo into the mix
    Looking at a single 78/75 or 85mm turbo, 80# @ 3bar injectors and dual walbro 450 pumps and swap to a return style fuel system. In the e38 file I see a 2bar and a 3bar chart in I think was the airflow table, dont have my computer with me to verify. Can I install a 3bar sensor and use those to adjust the fueling? I'm so used to the 411pcm with cos3. Was so easy to tune for sd. Are there any write ups or tutorials I can read through while I'm gathering parts?

    Old setup
    2001 GMC Sierra C3, 6.0L, AWD, pacesetter LT, ORY, dmax 4" exhaust and 14" magnaflow, 05 e-fans, NNBS intake manifold, K&N intake, Comp Ls-R 227/235 .614/.621 113LSA, WCCH P&P heads. Procharged with a D1-sc.
    2001 GMC Sierra CK1500 C3: 12.020 @ 111.580 MPH
    New Setup: 5.3L, 80E with HD2 shift kit, stock converter, NNBS intake mani, Pacesetter LT, ORY and 4" exhaust.

  4. #4
    Lifetime Member
    Join Date
    Mar 2006
    Posts
    4,792

    Default

    Quote Originally Posted by andysc3 View Post
    Thank you. It did end up having a vaccum leak from the hose that goes to the passenger side valve cover.

    But it all may end up getting replaced soon as I had gotten the okay to adding a turbo into the mix
    Looking at a single 78/75 or 85mm turbo, 80# @ 3bar injectors and dual walbro 450 pumps and swap to a return style fuel system. In the e38 file I see a 2bar and a 3bar chart in I think was the airflow table, dont have my computer with me to verify. Can I install a 3bar sensor and use those to adjust the fueling? I'm so used to the 411pcm with cos3. Was so easy to tune for sd. Are there any write ups or tutorials I can read through while I'm gathering parts?
    Yes, just install 3 Bar MAP and change the MAP sensor settings to match. Then tune VVE and/or MAF to suit. No COS needed nor will there likely be one for your vehicle. Look at swingtan's VVE tuning tutorial, same principles apply. You will need to change the scaling of the spark tables and use the 3Bar VVE tables.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  5. #5
    Lifetime Member
    Join Date
    Jan 2012
    Posts
    213

    Default

    Okay. Thank you for your help.

    Old setup
    2001 GMC Sierra C3, 6.0L, AWD, pacesetter LT, ORY, dmax 4" exhaust and 14" magnaflow, 05 e-fans, NNBS intake manifold, K&N intake, Comp Ls-R 227/235 .614/.621 113LSA, WCCH P&P heads. Procharged with a D1-sc.
    2001 GMC Sierra CK1500 C3: 12.020 @ 111.580 MPH
    New Setup: 5.3L, 80E with HD2 shift kit, stock converter, NNBS intake mani, Pacesetter LT, ORY and 4" exhaust.

Similar Threads

  1. LS Wrangler P0171 and P0174 Help
    By Rubikean in forum Petrol / Gas
    Replies: 2
    Last Post: March 9th, 2017, 10:38 AM
  2. P0171 & P0174 SC 2010 Camaro
    By opcode in forum E37, E38 & E67 PFI ECM's
    Replies: 14
    Last Post: July 26th, 2016, 09:19 AM
  3. P0171 and P0174 codes. Please help
    By JoshH in forum E37, E38 & E67 PFI ECM's
    Replies: 7
    Last Post: November 3rd, 2009, 04:23 PM
  4. threw a p0171
    By birdman in forum Gen III V8 Specific
    Replies: 3
    Last Post: July 27th, 2008, 07:31 PM
  5. P0171, P0174 Banks 1,2 lean
    By limited cv8r in forum General (Petrol, Gas, Ethanol)
    Replies: 4
    Last Post: September 5th, 2006, 07:49 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •