Tuning DFCO
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Tuning DFCO
Can someone enlighten about tuning DFCO. i keep looking at that section and having no clue what the hell i'm looking at. also, while we are on the topic of cutting fuel, how do i use lean cruise since it was disabled from the factory.
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Lean cruise cannot be enabled due to emissions. DFCO cuts fuel based on the parameters you are looking at, you can adjust them to have less delay or hold DFCO longer or come on sooner.
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You can do a quasi lean-cruise using a custom operating system in EFILive, and I'm sure that HPT has something similar. This is the commanded air/fuel ratio table that COS3 gives you in EFILive, if you put higher than stoich numbers in the lighter load cells you can "fake" a lean cruise condition.
What are you confused about with DFCO? What are you trying to accomplish?
What are you confused about with DFCO? What are you trying to accomplish?
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Heres what thunder is talking about. My table in COS 3 looks similar to this. See the bottom post by kbracing. https://www.performancetrucks.net/fo...ght=map+sensor
how the hell do u do a show post.
I think the lean cruise stuff is disabled in our pcm. Hardcoded in the US pcm pins, the holden one use it. I remember a thread but cant find it
how the hell do u do a show post.
I think the lean cruise stuff is disabled in our pcm. Hardcoded in the US pcm pins, the holden one use it. I remember a thread but cant find it
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You can do a quasi lean-cruise using a custom operating system in EFILive, and I'm sure that HPT has something similar. This is the commanded air/fuel ratio table that COS3 gives you in EFILive, if you put higher than stoich numbers in the lighter load cells you can "fake" a lean cruise condition.
What are you confused about with DFCO? What are you trying to accomplish?
What are you confused about with DFCO? What are you trying to accomplish?
In DFCO, i just dont really understand how to make the most of it. ex. when i let off the gas going down a hill in drive it takes like 10 seconds for DFCO to kick in but if i manually downshift it seems to kick in almost right away, how do i change that? also, is DFCO cutting ALL fuel, or just some and is there a way to change that as well?
i think i'll do a little more searching to see if i can actually make the lean cruise work. i just cant see GM taking the time to hardwire the inability to use lean cruise into our PCMs. it seems more fitting that they just disabled it and there is some complicated way to re-enable it. maybe i will try and get a hold of a stock Holden tune and see what that looks like. Anybody have one?