# Intermittent misfire on one bank

**URL:** <https://community.cartalk.com/t/intermittent-misfire-on-one-bank/124030>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, caprice\
**Created:** [August 30, 2018, 9:33am UTC](https://community.cartalk.com/t/intermittent-misfire-on-one-bank/124030 "2018-08-30T09:33:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![hajahmadj\_141558](https://avatars.discourse-cdn.com/v4/letter/h/a8b319/32.png) [@hajahmadj\_141558](https://community.cartalk.com/u/hajahmadj_141558)\
**Post date:** [August 30, 2018, 9:33am UTC](https://community.cartalk.com/t/intermittent-misfire-on-one-bank/124030/1 "2018-08-30T09:33:31Z")

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Dear lovely community,  
I have a 2007 chevy caprice v6 with LE0 engine 3.6L.  
For a while now there was some sort of hesitation and was running rough on 1500 to 2000 rpms. If I floor it the engine will respond great. Now the car is running worse than before with random misfires on Cylinders 1, 3, and 5.  
I have new spark plugs and the throttle body have been cleaned.  
I don’t think it’s the coils because I have swapped the coils between banks and still have the misfires on the same side.  
One thing I should mention is that I’m running catless at the moment until I can afford replacements. " yep, you guessed it, I’m a student "  
However, even before that cats have failed, I did run into this infamous misfire.

Any help or points that could lead me to a fix, will be greatly appreciated.

Sincerely,  
Stereotypical broke student from across the Atlantic

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**Author:** ![Yosemite](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/yosemite/32/643_2.png) [@Yosemite](https://community.cartalk.com/u/Yosemite)\
**Post date:** [September 4, 2018, 2:33am UTC](https://community.cartalk.com/t/intermittent-misfire-on-one-bank/124030/2 "2018-09-04T02:33:48Z")

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You could have a vacuum leak on that cylinder head.

Yosemite