tune for better gas mileage?
I'm sorry, I'm afraid I still don't feel like I understand. Here's a log excerpt below:
If the stock Open Loop Throttle map forces you into open loop at over 20% throttle, then I should be in open loop. However, my O2Feedback is not zero, so either I'm in closed loop, or a zero for O2Feedback doesn't mean you're in closed loop, or I'm not understanding something.
Code:
RPM Speed O2Feedback TPS Load2Byte 3269.531 77.050 -3 32.549 79.062 3277.344 77.050 -1 34.902 87.188 3273.438 77.050 -3 34.902 91.250 3277.344 77.050 -5 34.902 95.000 3281.250 77.050 -6 34.902 97.812 3289.062 77.050 -2 34.902 100.312 3289.062 77.050 -3 34.902 102.812 3296.875 77.050 0 34.902 102.812 3308.594 77.050 0 34.902 102.500 3316.406 77.050 0 34.510 100.938 3320.312 78.293 0 34.510 99.062 3332.031 78.293 -1 33.333 87.188 3332.031 78.293 -1 33.333 85.938
The throttle requirement for that rpm is over 60% I think because the map says 3 volts.
So you're meeting the load requirement. You don't need to meet both load and throttle requirements.
If you had a wideband you'll probably see your AFR start going richer in that area.
Last edited by roger smith; Sep 20, 2007 at 01:27 PM.
There it is going into open-loop when you reach 100 load. The reading isn't instantaneous for some reason as with items that get logged, like load error (but that's off-topic so nevermind). My car does the same. Open-loop load map at 3000/3500 is about 85 or 90 right? You're over that 85 or 90.
The throttle requirement for that rpm is over 60% I think because the map says 3 volts.
So you're meeting the load requirement. You don't need to meet both load and throttle requirements.
If you had a wideband you'll probably see your AFR start going richer in that area.
The throttle requirement for that rpm is over 60% I think because the map says 3 volts.
So you're meeting the load requirement. You don't need to meet both load and throttle requirements.
If you had a wideband you'll probably see your AFR start going richer in that area.
Ah! I see. The problem I had was that in this post MalibuJack says the open loop threshold is at about 20% throttle, so I thought to myself that I should be in open loop based on throttle alone. So... from what you've said, I guess the TPS is a 5 volt sensor, and you can just divide the value in the map by 5 (and multiply by 100) to get throttle percentage?
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