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Thread: 426 F1A procharged Ram ETC issues

  1. #1
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    Jul 2018
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    426 F1A procharged Ram ETC issues

    Hey, I'm trying to solve a throttle drop out issue on my 2009 ram. I'm running a 92mm hellcat TB on a ported 6.1L intake manifold on a new 426 and if I'm cruising at highway speed it throws the ETC and puts it into limp mode. Initially I had a pedal code but I believe it was a stored code from when I did a start up with the pedal disconnected and after clearing it it has never resurfaced. Initially I thought it was pedal related since I had an aftermarket TCM tapped into the pedal but I've isolated the signal and the problem persists. I've changed to a stock throttle body and there's no change, issue still happens and I've chased every mechanical possibility.

    The issue does not exist on street driving but as soon as I get on the highway and cruise for about 5 minutes with minimal throttle input it'll throw the ETC and drop throttle control. A shut off and restart clears it and it'll happen again in another 5-10 min down the road.

    Attached is the tune and a datalog of the drop out, around 6 minutes into the log.
    Attached Files Attached Files
    Last edited by charonblk07; 09-29-2019 at 11:32 AM.

  2. #2
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    Can anybody shed some light on this?

  3. #3
    Tuner in Training
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    Apr 2017
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    I am not forced induction, but when my 426 started doing that, I found I had a bad MAP sensor. Kinda unnerving when doing 75mph on a crowded highway...

    my build is a 6.1 based 426 @ 13:1 compression. 5.7 Eagle heads with a 6.1 intake.

  4. #4
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    Quote Originally Posted by THXDEAR426 View Post
    I am not forced induction, but when my 426 started doing that, I found I had a bad MAP sensor. Kinda unnerving when doing 75mph on a crowded highway...

    my build is a 6.1 based 426 @ 13:1 compression. 5.7 Eagle heads with a 6.1 intake.
    Interesting, for the sake of a $30 part I'll give it a try, I've tried damned near everything else.