When does the ECU go into Open Loop?
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From: Central PA
Originally Posted by edomund,Jul 8 2008, 05:50 AM
hondaf1, I have read before from 1 guy that after 25% TPS it is in open loop regardless of map or rpm & after 5000rpm it is regardless of tps & map. So I am pretty sure there is some set #'s where it's always open loop. I need some others to confirm these #'s. Once I hook up my innovate 02 I will be able to help confirm I just think others must have already tested this.
sqtb, thats not really a very helpful post. I'm sure there are already people on the forum with scan tools who checked this already.
sqtb, thats not really a very helpful post. I'm sure there are already people on the forum with scan tools who checked this already.
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From: Northern Cali
Thanks Castro, & yeah I remember meeting you at the meet.
mugen, wow 80% seems pretty high. I would think it would be lower 79% is a lot of throttle to still be running a stoich AFR. In my RX7 it went into open loop much lower around 30% TPS (that was turbo though). You could be right as I haven't checked it out myself.
When I get my EU or AFC I will test this out also.
Ed
mugen, wow 80% seems pretty high. I would think it would be lower 79% is a lot of throttle to still be running a stoich AFR. In my RX7 it went into open loop much lower around 30% TPS (that was turbo though). You could be right as I haven't checked it out myself.
When I get my EU or AFC I will test this out also.
Ed
Joined: Oct 2007
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From: Sacramento
^
you also gotta remember that in boosted applications most of the time it wants to change modes once it sees boost. I installed a supercharger on my other car that had only a MAF. It led me to install a URD external MAP sensor which once it saw more than .5psi of boost, it would intercept both afr sensor signals and force the ECU to go open loop. Perhaps your rx7 was the same way?
you should also ask in the F/I section as they may know the stock ecu parameters
you also gotta remember that in boosted applications most of the time it wants to change modes once it sees boost. I installed a supercharger on my other car that had only a MAF. It led me to install a URD external MAP sensor which once it saw more than .5psi of boost, it would intercept both afr sensor signals and force the ECU to go open loop. Perhaps your rx7 was the same way?
you should also ask in the F/I section as they may know the stock ecu parameters
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From: Chiswick
Originally Posted by hondaf1,Jul 8 2008, 07:23 AM
there is really no magical number. open loop is determine by load which is calculated from RPM, VAC and Throttle. if you have a wideband, you can see when open loop is activated. i would say it's usually between 15%-20%, but don't take my word for it.
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From: Northern Cali
Yeah, I will definatly do my own testing once I get a piggy back and my innovate wideband 02 hooked up. I just thought I'd get a head start & get others info on the subject to confirm my findings once I test.
Thanks guys,
Ed
Thanks guys,
Ed
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