GMC Posted November 2, 2011 Share Posted November 2, 2011 See the pictures below....... I know what the chip does - switches between 95 & 98 RON fuel, buy which way round is which?? A = 95 or 98? Also which way round in the holder should it sit? Thanks again Quote Link to comment Share on other sites More sharing options...
Dom400 Posted November 3, 2011 Share Posted November 3, 2011 (edited) Hi GMC, I dont know if your connection is the same as my 16v but if you look at the connector clip there is a small arrow pointing up, I use this to indicate which setting its on. As for the chip luckily mine has the 95 & 98 printed on it rather than A & B. But for a stab in the dark i would say A is normal driving conditions i.e. 95 and B setting would be for 98RON. Got access to a dyno you could test it on? Laters Dom Edited November 3, 2011 by Dom400 Quote Link to comment Share on other sites More sharing options...
GMC Posted November 4, 2011 Author Share Posted November 4, 2011 Thanks for that Dom, yes it has an arrow. So, does anyone know 100% that A = 95 RON & B = 98RON Quote Link to comment Share on other sites More sharing options...
Exclusive Opel Posted November 4, 2011 Share Posted November 4, 2011 I have one in my Astra but can't tell which way round it is as the letters printed on it are long gone! But should be simple enough to check with a multimeter as it should only contain a resister and a straight through link, that's how mine is anyway. On my car it's the resisted side that is used for the higher octane rating as my plug is for 91 and 95 (it's an old car!) Quote Link to comment Share on other sites More sharing options...
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