I am the original owner of a 2015 that now has 163k miles on it. No problems, have some upgrades professionally installed (MishiMoto intercooler, 3" catted downpipe, Whoosh! Hybrid turbo, COBB Tuning tune etc.).
Tuesday I got "P0303: Misfire on Cylinder 3" on my way home from work. I pulled the intake manifold today and did the walnut media blast on all the valves, following the procedure outlined here:
https://www.fiestastforum.com/threads/intake-valve-walnut-blasting-my-diy-experience.32544/
And I'm certain I put everything back together correctly.
I started the car - long ignition sequence before firing up, then rough AF. I hooked up the reader and good Lord.
Any insight is greatly appreciated!
Code 0420 is from the tune, but the rest are new.
![20240803_192112.jpg](https://www.fiestastforum.com/data/attachments/62/62744-080174301e036f55191369143af2f5e4.jpg)
Tuesday I got "P0303: Misfire on Cylinder 3" on my way home from work. I pulled the intake manifold today and did the walnut media blast on all the valves, following the procedure outlined here:
https://www.fiestastforum.com/threads/intake-valve-walnut-blasting-my-diy-experience.32544/
And I'm certain I put everything back together correctly.
I started the car - long ignition sequence before firing up, then rough AF. I hooked up the reader and good Lord.
Any insight is greatly appreciated!
![20240803_192131.jpg](https://www.fiestastforum.com/data/attachments/62/62729-9ce50f62c6f78694a64a759c970f77be.jpg)
![20240803_192129.jpg](https://www.fiestastforum.com/data/attachments/62/62730-2dedaa2485fbd410a4bb9b8fa7b02135.jpg)
![20240803_192127.jpg](https://www.fiestastforum.com/data/attachments/62/62731-404326ae552503a8ae487d2024c48517.jpg)
![20240803_192125.jpg](https://www.fiestastforum.com/data/attachments/62/62732-95589f1f856c3502ea9e0671a5501e04.jpg)
![20240803_192123.jpg](https://www.fiestastforum.com/data/attachments/62/62733-7127e7e9b4a755f4c7b7af909a7857f7.jpg)
![20240803_192122.jpg](https://www.fiestastforum.com/data/attachments/62/62734-5a5faa4750f0deb14168608d16f68863.jpg)
![20240803_192120.jpg](https://www.fiestastforum.com/data/attachments/62/62735-4ee31af08d418b7c0660533f6dd1e933.jpg)
![20240803_192118.jpg](https://www.fiestastforum.com/data/attachments/62/62736-ea4b5ad8044050485b8441e3ffae588e.jpg)
![20240803_192116.jpg](https://www.fiestastforum.com/data/attachments/62/62737-fb99364fc7fe1602b69efd650b67f5e0.jpg)
![20240803_192112.jpg](https://www.fiestastforum.com/data/attachments/62/62738-080174301e036f55191369143af2f5e4.jpg)
![20240803_192115.jpg](https://www.fiestastforum.com/data/attachments/62/62739-44c97d942b2cca72c7a964a54f49a1be.jpg)
Code 0420 is from the tune, but the rest are new.
![20240803_192104.jpg](https://www.fiestastforum.com/data/attachments/62/62743-ea579590b162607065ebae9bb93d2cea.jpg)
![20240803_192112.jpg](https://www.fiestastforum.com/data/attachments/62/62744-080174301e036f55191369143af2f5e4.jpg)
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