# SR20 PFC high knock.

**URL:** <https://forums.speedlife.net/t/sr20-pfc-high-knock/127145>\
**Category:** SON240sx Automotive\
**Created:** [August 12, 2009, 5:22pm UTC](https://forums.speedlife.net/t/sr20-pfc-high-knock/127145 "2009-08-12T17:22:43Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Souljourner](https://avatars.discourse-cdn.com/v4/letter/s/a88e4f/32.png) [@Souljourner](https://forums.speedlife.net/u/Souljourner)\
**Post date:** [August 12, 2009, 9:21pm UTC](https://forums.speedlife.net/t/sr20-pfc-high-knock/127145/3 "2009-08-12T21:21:48Z")

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> [@REALbasic help needed](https://forums.speedlife.net/t/realbasic-help-needed/23522/3):
>
> Do you feel a diffrence in power when it registers the high knock count?  
> bogging of any kind? and what are you running for Ignition? stock coil packs?

sorry i forgot to mention, the coil packs are stock, and spark plugs are NGK PFR7G-11’s gapped to .8 mm

There is a loss of power but that could be caused by knock feedback from the PFC to reduce timing?

John

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