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Thread: 05 Silverado 5.3 Ol/CL afrs dont make sense

  1. #1
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    Unhappy 05 Silverado 5.3 Ol/CL afrs dont make sense

    Working on a cammed 05 5.3, tuned the maf and ve seperatly in ol using wb02 with everything +-3%. Set tune to CL with ltfts enabled and the afrs are way lean and when it goes to closed loop. Wot is fine still. Cruising is okay. Idle is weird. Stft are -2 to 3% in the short log I ran. Nb02s look lazy at idle and if I highlight and average them they are in the higher 500s. When restarting the truck its in the mid 14s until it switches over. Switchpoint is at 450mv across the board. The tune is work in progress but I wanted to get it running decent at for a friend. I will post a log and copy of the tune when i get a chance to log it again and set up my pids and dash alittle better. In tge mean time, any thoughts?

  2. #2
    Joe (Moderator) joecar's Avatar
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    Post latest tune file.

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    Will do tonight

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    ModifiedTune2_newgears_OL_VETUNING_0033.ctzLIGMAN_OL VE Tuning.efiFINAL_TUNE.ctzLIGMAN_FINALTUNE.efi

    1st tune- open loop ve
    2nd-ve ol
    3 final tune trims enabled
    4.log before my battery died on the computer (ntk wideband disconnected) afrs were from his aem wideband which I didn't have any expressions for which is why I used my ntk for the tuning

    Tune isn't finished but just got it so its driveable. The tune was originally a tune from black bear but it was kind of a pain going back and forth and waiting for revisions so I decided to tackle it myself, so most of the trans tuning is theres.

  5. #5
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    I didn't do any calc vet etc, figured the results would be the same in the end using the wideband and tuning seperatly in OL

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    Any thoughts?

  7. #7
    Joe (Moderator) joecar's Avatar
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    I'm still looking... so FINAL_TUNE.ctz is the current tune in the PCM...?

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    Correct

  9. #9
    Joe (Moderator) joecar's Avatar
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    Can you log these pids instead, see attached, copy attached file to Documents\EFILive\V7.5\PIDs

    and then on PIDs tab in scantool, open that file (to select those pids).
    Attached Files Attached Files

  10. #10
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    Quote Originally Posted by joecar View Post
    Can you log these pids instead, see attached, copy attached file to Documents\EFILive\V7.5\PIDs

    and then on PIDs tab in scantool, open that file (to select those pids).
    Do you want the truck still set in closed loop? Just as it is?

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