Engine > airflow > General > MAF Calibration > airflow vs fq.
Engine > airflow > General > MAF Calibration > airflow vs fq.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Well, that's what I thought. But, this is not what I expected to see...and I can't do what I need to do with this.
MAF.jpg
2011 Buick Lucerne 3900...it's a work in progress
Change the layout so you can see it better. Click the horizontal split and not the vertical split on the upper left.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
This is it. I'm expecting to see something I can correlate with clyair, or do I have that wrong and need to convert lb/min to lb/hr?
MAF.jpg
Last edited by JLF1977; 3 Days Ago at 10:45 PM.
2011 Buick Lucerne 3900...it's a work in progress
I guess I don't know what you are trying to do. The MAF table is using the MAF airflow Fq channel in the scanner. You can change the units in the scanner and in the editor to show what you want. The MAF table is used to add or remove fuel from a specific Hz range.
The cylinder airmass channel is with timing.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Ultimately, yes, I should have mentioned the end goal here. Just aiming to get fuel trims right, and in a better place. I was expecting a big table. I guess I didn't really know what I was looking at. I can do that conversion pretty easily. Lb/min to lb/hr is an easy conversion. This learning curve is definitely a thing I am working on. My trims, generally speaking aren't all that far off, but I'm trying to smooth things out, and get it to idle/cruise leaner. I've gotten it to the point where it's snappier on throttle, but highway gas mileage has not really improved. It's about the same as it was. I'd really like to lean it out on the highway to that end.
2011 Buick Lucerne 3900...it's a work in progress
Without really putting much thought or effort into it, all you need to do and look at your log and see what the MAF hz is showing in the cruising areas. Then just highlight from say 2,500hz to 4,500hz for example and minus 2% worth a fuel, then smooth the table. Flash it and see what the fuel trims look like.
And you can't really lean it out a lot for freeway driving if you keep closed loop active. You could pull away 10% worth of fuel but in closed loop it's just going to make the fuel trims add all that fuel right back in.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Yeah, I had seen the closed loop thing somewhere else in this thread, and it give me ideas, but this is an area that even with DHP software that I used back in the day I never messed with. If that's a path I'm looking to go down, how would that happen? Can you keep it in Open Loop during cruise and then with TP increase, it will go Closed Loop? I need to look at this a lot. I think this car can do better than it does. FWIW, I also changed the oxygen sensor today, and it made a MASSIVE difference at idle. It idles a lot smoother now, which was not something I expected. The sensor I removed was the factory sensor being 14 years old with 141,000 miles on it. I don't have logs with it, yet, but I might get a couple in on the way to church in the morning. THanks.
2011 Buick Lucerne 3900...it's a work in progress
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