lbz defuel - Chevy and GMC Duramax Diesel Forum
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post #1 of 3 (permalink) Old 12-15-2010, 02:26 PM Thread Starter
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lbz defuel

just wondering what table you change to remove some defuel just want a little taken out any thoughts i have a few different ideas but just looking for straight forward answer

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post #2 of 3 (permalink) Old 12-15-2010, 03:14 PM
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On the LLY, there isn't any single table. Combo of throttle inj, main injection, base torque tables. I see you have an LLY, but asking about LBZ. LBZ defueling can be caused from a number of different things. TCM is one, fuel pressure tables can be another.

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Last edited by IdahoRob; 12-15-2010 at 03:16 PM.
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post #3 of 3 (permalink) Old 12-15-2010, 09:34 PM
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As Rob stated, you have to adjust shift defuel in the TCM for an LBZ. There is another way, but it involves fully rewriting the tune around the TCM torque commands. It's an ugly mess.

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