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Author Fuel octane rating plug?
daz_SRi
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Registered: 9th Apr 06
Location: Wolverhampton Drives: Astra 1.6
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18th Jun 06 at 18:11   View User's Profile U2U Member Reply With Quote
Sitting in the bath i had a read of my corsa's manual (better than listening to the crappy pop charts) And come across a feature on page 68 that says on the C12 NZ, 12NZ, C14NZ and C14SE (my engine) there is a plug which you swap over (turn through 180 and re insert) to tell the engine what octane fuel you are using. From the diagram it looks like its by the drivers side front shocker top mount.

Anybody got any info on what this does? I assume it changes the igntion timing slightly but are there any economy benefits? (i doubt there will be any noticeable performance alterations)
Sam
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Registered: 24th Dec 99
Location: West Midlands
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18th Jun 06 at 18:14   View User's Profile U2U Member Reply With Quote
I think it's used on engines that don't have a knock sensor.
Sam
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Registered: 24th Dec 99
Location: West Midlands
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18th Jun 06 at 18:15   View User's Profile U2U Member Reply With Quote
http://www.topbuzz.co.uk/info/ron_plugs/ron_plugs.htm for more information.
Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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18th Jun 06 at 18:16   View Garage View User's Profile U2U Member Reply With Quote
its there to stop detonation (pinking)

when you put crap fuel in... whatever the lower octane number it mentions is... then it alters the timing so it doesnt damage the engine

you need it on 95 setting though, or it wont run right
Sam
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Location: West Midlands
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18th Jun 06 at 18:17   View User's Profile U2U Member Reply With Quote
The knock sensor does this now though am I right, Robin?
Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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18th Jun 06 at 18:18   View Garage View User's Profile U2U Member Reply With Quote
knock sensor detects detonation, and alters the timing to eliminate it

so yes, in a way, its the same
Sam
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18th Jun 06 at 18:18   View User's Profile U2U Member Reply With Quote
Paul H
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Registered: 11th Aug 03
Location: Lincoln.
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18th Jun 06 at 18:18   View User's Profile U2U Member Reply With Quote
i rember these things on the old cavaliers
Greg_M
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Registered: 2nd Sep 03
Location: Grantham, Lincolnshire
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18th Jun 06 at 18:23   View User's Profile U2U Member Reply With Quote
the c20xe hss one fo 95ron and 98ron.

you can buy different ones from vaux

[Edited on 18-06-2006 by Greg_M]

 
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