# knocking using regular gas

**URL:** https://forums.speedlife.net/t/knocking-using-regular-gas/81689
**Category:** SON240sx Automotive
**Created:** [September 28, 2004, 5:46pm UTC](https://forums.speedlife.net/t/knocking-using-regular-gas/81689 "2004-09-28T17:46:12Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![pik420](https://avatars.discourse-cdn.com/v4/letter/p/858c86/32.png) [@pik420](https://forums.speedlife.net/u/pik420)
#### Post date: [September 28, 2004, 5:46pm UTC](https://forums.speedlife.net/t/knocking-using-regular-gas/81689/1 "2004-09-28T17:46:12Z")

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Hey guys I have a guy at work that is driving a 90 hatch and he mentioned that his engine knocks when he uses regular fuel but not when premium is used any ideas?

Cheers

Bryce

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### Author: ![Uniac](https://avatars.discourse-cdn.com/v4/letter/u/34f0e0/32.png) [@Uniac](https://forums.speedlife.net/u/Uniac)
#### Post date: [September 28, 2004, 6:07pm UTC](https://forums.speedlife.net/t/knocking-using-regular-gas/81689/2 "2004-09-28T18:07:21Z")

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early 89 motor, retard the timing and good to go.

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### Author: ![nocwage](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nocwage/32/5489_2.png) [@nocwage](https://forums.speedlife.net/u/nocwage)
#### Post date: [September 28, 2004, 6:20pm UTC](https://forums.speedlife.net/t/knocking-using-regular-gas/81689/3 "2004-09-28T18:20:36Z")

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Yeah his timing must be messed up.  
Just loosen the bolts on the distributor and turn it back a few degrees.

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### Author: ![AnDrEw](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@AnDrEw](https://forums.speedlife.net/u/AnDrEw)
#### Post date: [September 28, 2004, 10:35pm UTC](https://forums.speedlife.net/t/knocking-using-regular-gas/81689/4 "2004-09-28T22:35:04Z")

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> [@nocwage](#):
>
> Yeah his timing must be messed up.  
> Just loosen the bolts on the distributor and turn it back a few degrees.

use a timing light when you do this. IIRC correctly the SOHC is ± 15 deg. Its written on the underneath of the hood. just retard it a touch of this to like half way between 10 and 15 deg. marks. I might be as simple as to far advanced.

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### Author: ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)
#### Post date: [September 29, 2004, 10:05am UTC](https://forums.speedlife.net/t/knocking-using-regular-gas/81689/5 "2004-09-29T10:05:39Z")

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On a SOHC motor its safe to run as high as 17deg on 87 anything more than that you need 89+