# 4.3 Vortec Misfire

**URL:** <https://forums.speedlife.net/t/4-3-vortec-misfire/242568>\
**Category:** Shift518 Automotive\
**Created:** [March 5, 2009, 4:18am UTC](https://forums.speedlife.net/t/4-3-vortec-misfire/242568 "2009-03-05T04:18:31Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![dc2nick](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dc2nick/32/6289_2.png) [@dc2nick](https://forums.speedlife.net/u/dc2nick)\
**Post date:** [March 5, 2009, 4:39am UTC](https://forums.speedlife.net/t/4-3-vortec-misfire/242568/4 "2009-03-05T04:39:47Z")

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> [@focusinprogress is a free man](https://forums.speedlife.net/t/focusinprogress-is-a-free-man/15055/50):
>
> Does it idle rough? I had the same code in my 3.8 series 2 motor and found it was a vacuum leak.

nope idles beautifuly. its only when ur on the gas enough to keep it at a constant speed.

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