# \#pre-injection

**URL:** https://community.tunersguild.com/tag/pre-injection/136.md

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## [Why aren't pre-injection maps showing up as 16×16 in EDC17 CP44 — and how do I find them?](https://community.tunersguild.com/t/why-arent-pre-injection-maps-showing-up-as-16x16-in-edc17-cp44-and-how-do-i-find-them/133)

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**Author:** [@ThomasPirowski](https://community.tunersguild.com/u/ThomasPirowski)\
**Replies:** 0\
**Last updated:** [May 9, 2026, 4:34am UTC](https://community.tunersguild.com/t/why-arent-pre-injection-maps-showing-up-as-16x16-in-edc17-cp44-and-how-do-i-find-them/133 "2026-05-09T04:34:37Z")

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If you searched an EDC17 CP44 file for pre-injection maps and the 16×16 shape from your training doesn’t appear, you’re not searching wrong. In this ECU pre-injection is stored as 8-bit values with 16-bit axes. A default…

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## [Diesel Stage 1 — engineering-first methodology in 5 posts](https://community.tunersguild.com/t/diesel-stage-1-engineering-first-methodology-in-5-posts/121)

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**Author:** [@ThomasPirowski](https://community.tunersguild.com/u/ThomasPirowski)\
**Replies:** 0\
**Last updated:** [May 2, 2026, 10:02am UTC](https://community.tunersguild.com/t/diesel-stage-1-engineering-first-methodology-in-5-posts/121 "2026-05-02T10:02:41Z")

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Stage 1 diesel tuning is usually framed as “raise the fuel limiter, push some boost, increase rail pressure a few percent.” Done that way, you leave 7-10% of the available efficiency on the table — and you don’t know why…

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## [How do I distinguish pre-injection from post-injection maps in EDC17?](https://community.tunersguild.com/t/how-do-i-distinguish-pre-injection-from-post-injection-maps-in-edc17/119)

<div class="topic-metadata">

**Author:** [@ThomasPirowski](https://community.tunersguild.com/u/ThomasPirowski)\
**Replies:** 0\
**Last updated:** [May 2, 2026, 9:34am UTC](https://community.tunersguild.com/t/how-do-i-distinguish-pre-injection-from-post-injection-maps-in-edc17/119 "2026-05-02T09:34:20Z")

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Pre-injection (DAMOS folder InjCrv\_PiI1 / map InjCrv\_qPiI1Bas on EDC16/17/MD1) and post-injection maps look similar in EDC17 binaries but differ on four clear tells: pre-injection values are 1-2 mg (10× smaller than post…

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## [Why does my 21% diesel tuning strategy give only 10-15% real gain?](https://community.tunersguild.com/t/why-does-my-21-diesel-tuning-strategy-give-only-10-15-real-gain/114)

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**Author:** [@ThomasPirowski](https://community.tunersguild.com/u/ThomasPirowski)\
**Replies:** 0\
**Last updated:** [April 30, 2026, 6:14am UTC](https://community.tunersguild.com/t/why-does-my-21-diesel-tuning-strategy-give-only-10-15-real-gain/114 "2026-04-30T06:14:51Z")

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A 21% diesel tuning strategy yields only 10-15% real gain because the math is correct but the hardware can’t deliver. Intercooler, intake, and exhaust flow limits cap torque growth before the math can finish. This is not…