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  1. C

    Won’t rev

    Fixed was in tune
  2. C

    Won’t rev

    Changed all sensors and new harness still in limp mode could timing being off tooth cause this I did change timing chain before I installed motor
  3. C

    Won’t rev

    Still no fix could crank sensor cause this ? I’ve change almost everything else
  4. C

    Won’t rev

    I’ll try another maf thanks
  5. C

    Won’t rev

    Thinking it’s something else tps resistance is smooth and never ran right from time of swap trying to find problem it’s like in limp mode ecu runs great on another swap my buddy has
  6. C

    Won’t rev

    Changed tps again still same but if I unplug tps it revs fine
  7. C

    Won’t rev

    Guy I have tuning says everything seems good but when I give throttle timing goes from 40 to nothing
  8. C

    Won’t rev

    2003 5.3 with 99 harness and computer, cable throttle body starts and idles fine but when you give throttle it’s like key switch is turned on and off unless you unplug tps. Already changed out tps same problem any help is greatly appreciated..
  9. C

    Ls 5.3 swap won’t take throttle and idle high

    PCM is from 99 dbc imma get my buddy to check the tune im beginning to think that’s what it is
  10. C

    Ls 5.3 swap won’t take throttle and idle high

    Cleaned all injectors and still same idles high and when you hit accelerator is will surge up and down as long as throttle is closed it just idles high
  11. C

    Ls 5.3 swap won’t take throttle and idle high

    Motor been setting for 4 or 5 years I’ll check injectors it idles better when I unplug maf
  12. C

    Ls 5.3 swap won’t take throttle and idle high

    2003 yukon5.3 into a 94c1500 cut my own harness and added a dbc throttle body and harness from 99 silverado. I’ve checked tps checked good it has aeromotive fuel pump installed

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