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Thread: Idle drops when put in drive on cold start. Hemi swap Wrangler

  1. #1
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    Idle drops when put in drive on cold start. Hemi swap Wrangler

    I have a 2016 Wrangler with a 6.4 Hemi and 8hp70 swap. The Jeep runs well, but on a cold start while the engine is still in high idle if I drop the transmission into gear it drops the rpm down too low. The engine never stalls, but it just doesn't feel like it should. I have played around with some idle tables, but haven't solved the issue. If anyone could take a look and give their opinion or advice on what to change, it would be appreciated.
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  2. #2
    Senior Tuner edcmat-l1's Avatar
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    Data log would help more than the tune file.

    By description it sounds way too rich. Probably need to pull some fuel out of the open loop tables.

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  3. #3
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    Quote Originally Posted by edcmat-l1 View Post
    Data log would help more than the tune file.

    By description it sounds way too rich. Probably need to pull some fuel out of the open loop tables.
    I'm not the best with the scanner. Any pointers on what channels to log?

  4. #4
    Senior Tuner edcmat-l1's Avatar
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    Quote Originally Posted by Redcycle13 View Post
    I'm not the best with the scanner. Any pointers on what channels to log?
    Do you know how to save and load a channel config?

    DODGE2015.Channels.xml

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  5. #5
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    Quote Originally Posted by edcmat-l1 View Post
    Do you know how to save and load a channel config?

    DODGE2015.Channels.xml
    I think so. The file you sent does not open in a way I understand.

  6. #6
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    Quote Originally Posted by Redcycle13 View Post
    I think so. The file you sent does not open in a way I understand.
    I figured it out. I just open the recent chanel configurations and put the file you sent in? Then start a scan and replicate the issue I'm having.

  7. #7
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    I'm not sure it will scan the data for the transmission. I used a PCS adapter to make the transmission talk to the ECU over the Canbus, but the transmission has its own OBD port that I have to scan separately I believe.

  8. #8
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    Here is what the log file looks like. Seems like it dropped the transmission channels you wanted?
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