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varying idle, odd shifting. LS1/T56

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  • varying idle, odd shifting. LS1/T56

    Hey guys, I figured I should probably address these problems first but I've noticed that after getting off the highway when I've been driving for a while my idle will be at like 1500rpm when I'm at a light or if I have the clutch in, starting to think maybe it's TPS but if I shut the car off and start it up again it usually solves the problem. I've also had problems with grinding going from 3rd to 4th intermittently, I think that it might be that my trans mount is screwed or an adjustment in the shifter (or at least I hope). Thanks for any help.

    Used to own a Firebird.

  • #2
    the clutch in hanging idle is common with modified untuned cars. the throttle follower setting need to be tweaked if it does this and all parts are good.
    3-4 grind after hard pulls or just random? could be a few things. clutch hydraulics or worn trans sliders, and sycro, broken keys

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    • #3
      Throttle follower setting?
      The 3-4 grind usually happens soon after startup and only on cold days, it didn't happen earlier on in the summer and I haven't been beating on the 3-4 shift at all. I used to have problems going from 1-2 if I brought back the shifter and it was too far to the left. Where exactly is the bleeder screw to my clutch master cylinder?

      Used to own a Firebird.

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      • #4
        bleeder is in the bellhousing above the slave line

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        • #5
          I'll have to look for it and bleed it in the spring and see if it fixes the problem, I hope it does. How do I adjust the throttle follower? Is it the setscrew on the throttlebody?

          Used to own a Firebird.

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          • #6
            its in the tune.
            clean the MAf and check for vacuum leaks, unmetered air first.

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