Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Results 1 to 8 of 8

Thread: Staying Open Loop

  1. #1
    Fuel Injected!
    Join Date
    Mar 2013
    Posts
    314

    Staying Open Loop

    Tuning 16197427 PCM with TunerPro and APU1. In the selections on the left hand side, what has to be changed to keep the PCM in OPEN LOOP? Please advise. Thanks.

  2. #2
    Fuel Injected! Dr_Grip's Avatar
    Join Date
    Apr 2015
    Location
    Germany
    Age
    37
    Posts
    115
    Quote Originally Posted by rsicard View Post
    Tuning 16197427 PCM with TunerPro and APU1. In the selections on the left hand side, what has to be changed to keep the PCM in OPEN LOOP? Please advise. Thanks.
    Why would you want to do that? :) There should be a "minimal temperature for closed loop" setting. Set the temperature to max and you'll stay in open loop.

  3. #3
    Fuel Injected! steveo's Avatar
    Join Date
    Aug 2013
    Posts
    2,166
    generally just not having an o2 sensor hooked up and disabling any o2 related error codes works too.

    the o2 has a readiness flag and without an o2 plugged in, it will probably never get set.

  4. #4
    Fuel Injected!
    Join Date
    Mar 2013
    Posts
    314
    Quote Originally Posted by Dr_Grip View Post
    Why would you want to do that? :) There should be a "minimal temperature for closed loop" setting. Set the temperature to max and you'll stay in open loop.
    Hard to get over the shock of the opening question. Then the proper answer is given about how to do it. The better the open loop tuning, the less the closed loop corrections need to be made.

  5. #5
    Fuel Injected! Dr_Grip's Avatar
    Join Date
    Apr 2015
    Location
    Germany
    Age
    37
    Posts
    115
    Quote Originally Posted by rsicard View Post
    Hard to get over the shock of the opening question. Then the proper answer is given about how to do it. The better the open loop tuning, the less the closed loop corrections need to be made.
    But you can use the correction data (BLM values) and an excel file to tune your engine. The base formula is simple: VE Table entry * (BLM Value/128). There are some caveats like VE tables being combined, but I am sure there's a guide somewhere in the GM tuning section.

  6. #6
    Fuel Injected! steveo's Avatar
    Join Date
    Aug 2013
    Posts
    2,166
    there's nothing wrong with open loop if emissions aren't a concern and you spend the time to get it right. stoich isn't always the best mixture for every operating condition.

  7. #7
    Fuel Injected!
    Join Date
    Aug 2012
    Posts
    234
    I set closed loop temp to 151 and open idle threshold to 151. My drivability in open loop is noticeably better than closed. The only thing is your ve tables can't be sloppy.
    6395, BHDF, 7.4 BBC lightly modded now 6395 BMHM back to BHDF

  8. #8
    Fuel Injected!
    Join Date
    Aug 2015
    Age
    37
    Posts
    39
    I started tuning in OL about 6 months ago and loved it so much I stayed there. It took a while to test over and over to get it best that I could. The throttle response is on point. It's not my daily but I do drive it with no issues. I did switch back to CL SD and MAF 2-3 weeks ago but it just didn't seem to have the power it has in OL. I do have other issues effecting my CL operation but again OL is so nice why not leave it.

Similar Threads

  1. Replies: 3
    Last Post: 09-06-2016, 07:06 AM
  2. Anyone else run open loop all the time
    By myburb in forum GM EFI Systems
    Replies: 7
    Last Post: 01-01-2016, 04:32 PM
  3. Open loop tune
    By bigtoyz in forum GM EFI Systems
    Replies: 0
    Last Post: 09-22-2015, 09:27 PM
  4. open loop idle 1227747
    By mmigacz in forum TunerPro Tuning Talk
    Replies: 0
    Last Post: 04-11-2014, 05:50 AM
  5. EE open loop idle
    By steveo in forum GM EFI Systems
    Replies: 17
    Last Post: 01-27-2014, 05:41 PM

Bookmarks

Posting Permissions

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