# 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:** 6

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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 13, 2009, 7:30am UTC](https://forums.speedlife.net/t/sr20-pfc-high-knock/127145/6 "2009-08-13T07:30:52Z")

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> [@Post pics of your ride in snowy situations](https://forums.speedlife.net/t/post-pics-of-your-ride-in-snowy-situations/23507/15):
>
> timing. fuel, shit spark plugs.
> 
> check all.

Timing at point of knock is 8 Degrees BTDC at boost of 16psi, 4500rpm  
Timing at idle is 15 degrees BTDC - verified with timing light

Fuel - A/F is at 12.0 at 4500RPM.

Shit spark plugs, checked and they look fine still. Perhaps i could try a different set at a colder temp range?

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