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Thread: Still having issues with RPMs dipping down and feeling like truck wants to stall

  1. #1
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    Still having issues with RPMs dipping down and feeling like truck wants to stall

    Attached a log of it happening. about 5:10 on the log, goes from 1200-1300 rpm to down below 550. I have added to the reserve load (33720), but still no luck. Will attach my tune and the log. Thanks in advance!
    Attached Files Attached Files

  2. #2
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    Can I adjust the Driver Demand tables? I cant tell by the data if its a fuel or air issue though, it happens so fast. Just that the torque goes negative and none are close to matching when it happens.

  3. #3
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    Anybody wanna tackle this for me? Be happy to pay. It is no fun towing a boat up a ramp, wondering if its gonna stall when you let off the gas.

  4. #4
    Your minimum spark hasn't been changed much, not sure how much that affects it. I'm not a "Tuner" per se but I adjusted your reserve load to reflect a "stage 2" style cam.
    transfixedfinally_Edit1.hpt

  5. #5
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    Quote Originally Posted by relicdew View Post
    Your minimum spark hasn't been changed much, not sure how much that affects it. I'm not a "Tuner" per se but I adjusted your reserve load to reflect a "stage 2" style cam.
    transfixedfinally_Edit1.hpt
    I will give that a try this afternoon and see. Thanks

  6. #6
    Sorry, I forgot to mention that under the "Airflow Tab"/Electronic throttle was changed from 3690 to 5054. Not sure why this was done or if this would cause an issue. I don't see any specs on your build so I'm assuming this is a L83 engine with a cam upgrade of sorts with stock throttle body? Someone smarter than me can chime in but put that back to stock?

  7. #7
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    Quote Originally Posted by relicdew View Post
    Sorry, I forgot to mention that under the "Airflow Tab"/Electronic throttle was changed from 3690 to 5054. Not sure why this was done or if this would cause an issue. I don't see any specs on your build so I'm assuming this is a L83 engine with a cam upgrade of sorts with stock throttle body? Someone smarter than me can chime in but put that back to stock?
    Sorry. Yes its a L83 with a stage 2 cam, with L86 intake and TB.

  8. #8
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    Quote Originally Posted by relicdew View Post
    Sorry, I forgot to mention that under the "Airflow Tab"/Electronic throttle was changed from 3690 to 5054. Not sure why this was done or if this would cause an issue. I don't see any specs on your build so I'm assuming this is a L83 engine with a cam upgrade of sorts with stock throttle body? Someone smarter than me can chime in but put that back to stock?
    I also just saw that as well. Shouldnt a stock L86 TB, which is on my L83 have that set to 4118?

  9. #9
    Yes, that's what a stock L86 is. Not sure how important that data is to change though to be honest. Again, I'm not a professional tuner, I typically provide some base tunes for customers for start-up and let smarter folks read data logs and dial folks in.