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How smart is the J20A engine? Can it make use of 95/98 fuel?
https://auszookers.com/forum/viewtopic.php?f=5&t=3708		 Page 1 of 1
Author:  TheOtherLeft [ Sat Jan 03, 2009 2:33 am ]
Post subject:  How smart is the J20A engine? Can it make use of 95/98 fuel?
Since petrol is getting quite cheap now I'm starting to think about using premium petrol again.

Can the J20A ecu advance the timing if using premium petrol, or does it have to be advanced manually?
Author:  Saam [ Sat Jan 03, 2009 5:25 am ]
Post subject:  Re: How smart is the J20A engine? Can it make use of 95/98 f
i notice a huge difference with my G13BB they are around the same era efi so there is my guessing advice.
Author:  Damo [ Sat Jan 03, 2009 12:37 pm ]
Post subject:  Re: How smart is the J20A engine? Can it make use of 95/98 f
Mmmmmm J20.... 8)

I don't know how the management on these things works exaclty, but unless it has a knock sensor I can't see the ECU changing the ignition timing outside the maps programmed into it's memory. My guess would be that you'd have to advance the timing manually.
Author:  Scrawny [ Sat Jan 03, 2009 6:26 pm ]
Post subject:  Re: How smart is the J20A engine? Can it make use of 95/98 f
You'll probably find the timing can't be adjusted. It will run better on premium though, and you'll get better economy too.
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