Results 1 to 4 of 4

Thread: L33 in a jeep yj with a th400 cant get over 75% throttle

  1. #1
    Member
    Join Date
    Mar 2009
    Posts
    94

    Default L33 in a jeep yj with a th400 cant get over 75% throttle

    I've been banging my head against a wall for a few days now trying to figure out why I cant apply over 75% throttle or the engine cuts out. It runs good until you exceed the throttle mark. We put a L33 in a older yj jeep with a th400 behind it. What research I did lead me to putting a 05 cts v tune OS with a manual trans tune in it. I've read and poked around for the last couple of days and nothing I've tried has helped can someone lead me the path...? This is my first time doing a non computer controlled transmission and I'm not a every day tuner so i'm lost.ken jeep cts tune only vats turned off_0004.ctz
    98 silverado 4wd excb 5.7l, zz4 cam,roller rockers, shorty headers, 0411 swap, Flash Scan V1 commercial

  2. #2
    Member
    Join Date
    Mar 2009
    Posts
    94

    Default

    I'm starting to think I have a P/N switch problem (lack of), I tried doing a CASE relearn and kept giving me an error. The tune I'm running is for a manual 2005 cts v manual tranny. Would anyone happen to know which pins I need to ground or apply voltage to at the ECM...? I'm also have a heck of a time with this thing dying when coming up to a stop from rolling, thinking this is playing into it as well.
    Last edited by haulinit; June 10th, 2020 at 11:03 PM. Reason: added info
    98 silverado 4wd excb 5.7l, zz4 cam,roller rockers, shorty headers, 0411 swap, Flash Scan V1 commercial

  3. #3
    New Member
    Join Date
    Jan 2022
    Posts
    1

    Default

    I tried doing CASE relearn but all in vain

  4. #4
    Member koolky's Avatar
    Join Date
    Aug 2013
    Posts
    58

    Default

    Does your pedal match your OS?

Similar Threads

  1. GM 5.3 in a Jeep?
    By Kennedy Diesel in forum Conversions / Aftermarket Parts
    Replies: 2
    Last Post: February 18th, 2016, 12:26 PM
  2. 2006 miata L33 & GTO pcm/harness swap?
    By finiata in forum Conversions / Aftermarket Parts
    Replies: 17
    Last Post: February 1st, 2012, 03:47 PM
  3. JEEP 4.0L engine to GM PCM?
    By THEFERMANATOR in forum Conversions / Aftermarket Parts
    Replies: 20
    Last Post: December 24th, 2010, 02:27 PM
  4. Need a Tune for a Gen3 in a Jeep
    By simadownow6988 in forum Gen III V8 Specific
    Replies: 6
    Last Post: December 24th, 2009, 05:38 AM
  5. 4l60e > Th400
    By Macon@MMP in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 4
    Last Post: January 10th, 2007, 12:07 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
  •