info on diy tuning

[5doorsoffury]

Hello,

I am trying to find some more information on DIY tuning guides or a collection of resource's. I'm not planning to self tune but knowing how the system works is key for problem solving. I am looking for information on fueling specifically if this ecu uses separate fueling strategies for closed loop vs open loop as far as fuel trims are concerned.

1) What is the max adjustment allowed in open loop fueling
2) What is the max adj of closed loop
3) Are they the same learned value used all the fueling table adjustments or does it have a separate learned fuel trim value at wot vs pt.
4) Is there any WOT fueling adjustment or does it follow the fueling table no matter the afr ect...
5) What is the limit of stft and ltft before a light gets thrown.

There's 30 more questions so instead of making a long post i just want to get pointed in the direction of some free reading material. FWIW this is in reference to 2018+ specifically a 22 gt
Thanks!

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[mejohn50]

1) This PCM only uses open loop when you start it and is in closed loop the rest of the time including WOT.

3) Fuel trims are constantly adjusting and learning.

4) WOT fueling is set by the power enrichment lambda table and it uses O2 sensor feedback to correct the lambda to what is set in the table. So it’s trying to achieve the lambda set point at all times WOT.

5) It takes 20% or 25% total trims (don’t specifically remember) to throw a CEL. That means STFT+LTFT=total trims

 

[K4fxd]

Looking through the PCMtec software it looks like some OSID's target 32% and others target 30% for like 10 seconds to throw a code.

 

[mejohn50]

Looking through the PCMtec software it looks like some OSID's target 32% and others target 30% for like 10 seconds to throw a code.

Thanks for clarifying. Whipple told me it takes 20 or 25% in their tune. I assumed it was the same stock.

 

[MrBD1348]

On this topic - anyone have good resources for learning coyote tuning?

 

[engineermike]

There are some not-free training classes you can take. The books aren’t that great. Or some combination of searching forums and trial and error. Just know that the ford logic is more complicated than imaginable and I dare say no one outside of ford fully understands it. Most tuners learn most of it by trial and error.

 

[mejohn50]

On this topic - anyone have good resources for learning coyote tuning?

I‘ll echo what @engineermike said. The Coyote specific books I’ve bought are nothing more than a glorified settings guide. I have a hard time believing most of the classes are any different than the books, just in person. Though I have heard that Greg Banish has put together an online Coyote class. He might be one of the few people outside of Ford who actually understands the logic.

I think your best bet to start would be to spend the money to get HP Tuners or PCMTEC (I think HP Tuners is more approachable for a beginner for now, but PCMTEC is going to be the way of the future on this platform), read out the file from your car, and start data logging your car. Look around in the tune file, find something you want to know more about, then data log parameters that have to do with it.

If you aren’t willing to put in at least dozens (probably hundreds or more) of hours learning the software, data logging, searching online, reading patents, reading forums, testing, and hitting dead ends…then just pay someone else to tune the car. You will not have a completed tune on your first weekend playing with the software.

Hope that helps.

 

[MrBD1348]

I‘ll echo what @engineermike said. The Coyote specific books I’ve bought are nothing more than a glorified settings guide. I have a hard time believing most of the classes are any different than the books, just in person. Though I have heard that Greg Banish has put together an online Coyote class. He might be one of the few people outside of Ford who actually understands the logic.

I think your best bet to start would be to spend the money to get HP Tuners or PCMTEC (I think HP Tuners is more approachable for a beginner for now, but PCMTEC is going to be the way of the future on this platform), read out the file from your car, and start data logging your car. Look around in the tune file, find something you want to know more about, then data log parameters that have to do with it.

If you aren’t willing to put in at least dozens (probably hundreds or more) of hours learning the software, data logging, searching online, reading patents, reading forums, testing, and hitting dead ends…then just pay someone else to tune the car. You will not have a completed tune on your first weekend playing with the software.

Hope that helps.

the car is already tuned and I’m very happy with it. I have the mpvi2+ already and I’m just looking to nose dive into learning as much as I can about the tuning side of things. Heard the same stuff about books being a settings guide too. I’ll just pick a setting or two a day and go from there. Probably won’t tune my own car for a while. But it’s nice to understand what’s actually going on

 

[K4fxd]

Welcome to the rabbit hole

 

[engineermike]

Setting a day? Better give each one a week or longer.

 

[mejohn50]

the car is already tuned and I’m very happy with it. I have the mpvi2+ already and I’m just looking to nose dive into learning as much as I can about the tuning side of things. Heard the same stuff about books being a settings guide too. I’ll just pick a setting or two a day and go from there. Probably won’t tune my own car for a while. But it’s nice to understand what’s actually going on

I think if you really want to understand what’s going on you need to read up on HDFX and how the mapped points system works. The mapped points system is the core of how modern Ford controllers work. If you ignore everything else and just focus on the mapped points system you’ll have your hands full for quite a while.

 

[MrBD1348]

Setting a day? Better give each one a week or longer.

was a hypothetical. who knows how long it'll take me to understand something - everyone learns at different speeds.

I think if you really want to understand what’s going on you need to read up on HDFX and how the mapped points system works. The mapped points system is the core of how modern Ford controllers work. If you ignore everything else and just focus on the mapped points system you’ll have your hands full for quite a while.

see this is the kind of thing i wanted to know. thank you

 

[mejohn50]

see this is the kind of thing i wanted to know. thank you

Hope it helps.

 

[engineermike]

I would say start on mapped points, then move to spark control (along with all the different sources), then torque control.

 

[EFI]

On this topic - anyone have good resources for learning coyote tuning?

Try this:

https://lasotaracing.com/collection...ts/the-coyote-cookbook-for-hp-tuners-software

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