# Injectors work on test but don't work when starting engine

**URL:** https://community.ecumaster.com/t/injectors-work-on-test-but-dont-work-when-starting-engine/1936
**Category:** EMU BLACK / CLASSIC
**Created:** [July 30, 2024, 8:13pm UTC](https://community.ecumaster.com/t/injectors-work-on-test-but-dont-work-when-starting-engine/1936 "2024-07-30T20:13:41Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![Koenje](https://avatars.discourse-cdn.com/v4/letter/k/c5a1d2/32.png) [@Koenje](https://community.ecumaster.com/u/Koenje)
#### Post date: [July 30, 2024, 8:13pm UTC](https://community.ecumaster.com/t/injectors-work-on-test-but-dont-work-when-starting-engine/1936/1 "2024-07-30T20:13:41Z")

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Greetings,

I’m trying to start the engine with wasted spark configuration. I’m changing from Speeduino to EMU Classic. The issue that I have is with the injectors, they are paired 1-4 and 2-3, high-z, using only 2 injector pins. When I run each in test mode, they work, but when I try to crank the car, they don’t activate at all. On the duty cycle it says 0%. Any tips on what could be wrong?

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### Author: ![MickyMcFinnigan](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/mickymcfinnigan/32/113_2.png) [@MickyMcFinnigan](https://community.ecumaster.com/u/MickyMcFinnigan)
#### Post date: [July 30, 2024, 9:42pm UTC](https://community.ecumaster.com/t/injectors-work-on-test-but-dont-work-when-starting-engine/1936/2 "2024-07-30T21:42:09Z")

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Is you brake switch wired and pressed? If not injectors won’t fire.

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### Author: ![Koenje](https://avatars.discourse-cdn.com/v4/letter/k/c5a1d2/32.png) [@Koenje](https://community.ecumaster.com/u/Koenje)
#### Post date: [July 31, 2024, 5:56am UTC](https://community.ecumaster.com/t/injectors-work-on-test-but-dont-work-when-starting-engine/1936/3 "2024-07-31T05:56:27Z")

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Ok, I will try this and let you know.

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### Author: ![Greg](https://avatars.discourse-cdn.com/v4/letter/g/71c47a/32.png) [@Greg](https://community.ecumaster.com/u/Greg)
#### Post date: [July 31, 2024, 6:29am UTC](https://community.ecumaster.com/t/injectors-work-on-test-but-dont-work-when-starting-engine/1936/4 "2024-07-31T06:29:06Z")

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Without log and project we cant help you.

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<div class="post-metadata">

### Author: ![Koenje](https://avatars.discourse-cdn.com/v4/letter/k/c5a1d2/32.png) [@Koenje](https://community.ecumaster.com/u/Koenje)
#### Post date: [July 31, 2024, 5:12pm UTC](https://community.ecumaster.com/t/injectors-work-on-test-but-dont-work-when-starting-engine/1936/5 "2024-07-31T17:12:38Z")

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Here is the emu file that I have: [Yamaha FZ6 - Pastebin.com](https://pastebin.com/fJnXd8rP)

The pulse width for the injectors is 6ms. Is says that it has sync while cranking.