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Old 16th July 2008, 08:40 AM   #40 (permalink)
ef_eg
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Join Date: Jan 2002
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Location: Auckland
Re: Any one do BRE or equivalent obd0 PR3 chipping???

Quote:
Originally Posted by Coupe-R View Post
He doesn't have a chip running the new BRE datalogging code thats why.
Then he can use BRE to log, yes you need AFR logged too

DO you guys hook wideband AFR directly into a OBD0 ECU through the oxy sensor primary or secondary??

or do you not log AFR through the software at all>?

I log wideband AFR through pin D14 on OBD1 so all data is in one program.
I knew I should have added datalogging to that chip! (wasn't sure if you needed it at the time).

Normally, the WB output get wired into the secondary O2 input on OBD0 and datalogged within BRE. This works out better than using the WB software's datalogging as it can easily relate the AFRs to the correct cells (also processing them statistically and allowing auto tune etc).

As for sniffers, I don't use one but screw in the WB oxy into the header and run open loop. Doesn't take long, and I think it is best to tune open loop anyway so the ECU cannot mess up your readings by compensating. Once tuned then put everything back and enable the O2s again (or stay open loop )

Edit: maybe you are running stock headers? so I am not sure if a WB into the primaries is a good idea. Maybe weld a bung at the collector instead?
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