2014 5.3 Cam Idle Tune

I have a 2014 sierra 5.3 mods are as listed
Texas speed stage 4 225/231, .635"/.635", 112 LSA
percision converter 3400 triple disk
Long tube headers full exhuast (no cats)
CAI
LT1 Intake manifold with LT1 throttle body
Running on E85

Im having issues with the truck Idling correctly seems like the cam likes to idle @850rpm
I know these gen v have alot to do with torque management to get it idle correctly

tune currently on the truck is not by me what i dont understand is on scanner idle desire is 1,072 but truck is jumping from 700-870 and on idle base point is set to over 1,000 rpm across the board
Attachment 105365
Attachment 105366

That tune is rough. The timing tables and things like that don't make much sense. Wouldn't be surprised if those headers are unbelievably hot and maybe glowing with all that negative timing.

I don't have a stock tune to compare with but I'd be half tempted to just start over.

Quote:

---

Originally Posted by 5FDP

That tune is rough. The timing tables and things like that don't make much sense. Wouldn't be surprised if those headers are unbelievably hot and maybe glowing with all that negative timing.

I don't have a stock tune to compare with but I'd be half tempted to just start over.

---

Yes I feel like starting from scratch would be the best but dont have a actual stock tune

you will need to get it done right to drive right

Here is an auto stock tune from the repository.

Your Virtual Torque tables need to be adjusted.

It looks like the tuner only manually adjust the airflow A table which #1, is the wrong way to do it, and #2 if you're running an E85 sensor then the ECU is referencing E85 Airmass/MAP and not the base Airmass VT tables and #3 the idle VT tables were increased which is the opposite of what needs to happen for a cam....not that it even matters because it was the wrong table. But stock values are still too high for a cam. Idle Speed Control multiplier shouldn't be 1.0 across the board, it looks like he was just trying to make it stable which it will never be because the ECU is pulling so much timing at idle due to the VT tables. The Variable Cam tables are really odd. I assume the cam is locked at 0? The tuner pretty much disabled Knock Retard as well.

See if the idle is any better with this file.

Attachment 105375

Quote:

---

Originally Posted by TriPinTaZ

Your Virtual Torque tables need to be adjusted.

It looks like the tuner only manually adjust the airflow A table which #1, is the wrong way to do it, and #2 if you're running an E85 sensor then the ECU is referencing E85 Airmass/MAP and not the base Airmass VT tables and #3 the idle VT tables were increased which is the opposite of what needs to happen for a cam....not that it even matters because it was the wrong table. But stock values are still too high for a cam. Idle Speed Control multiplier shouldn't be 1.0 across the board, it looks like he was just trying to make it stable which it will never be because the ECU is pulling so much timing at idle due to the VT tables. The Variable Cam tables are really odd. I assume the cam is locked at 0? The tuner pretty much disabled Knock Retard as well.

See if the idle is any better with this file.

Attachment 105375

---

I really appreciate the info and what you did Just flashed in the the tune truck is idling steady now any tips on just lowing them bit?
Attachment 105378

Quote:

---

Originally Posted by gmcserg

I really appreciate the info and what you did Just flashed in the the tune truck is idling steady now any tips on just lowing them bit?
Attachment 105378

---

Can you clarify what you are referring to with "lowing them"? Lowering the idle? Lowering the Virtual Torque?

Although until now I never tuned a gen v platform with a cam I understood most of what you are saying thanks to great rope garage youtube channel there isn't really any clear info or way like a sticky to tune a cam in the gen v platforms like russk on the gen 3 and the gen 4 although it's been over 5 years since they realeased these gen v ecms which is odd but watching great rope garage videos could help you understand this better really hoping that someone could chime into this to clarify this and maybe become a sticky soon enough but until then experiment is key

Quote:

---

Originally Posted by TriPinTaZ

Can you clarify what you are referring to with "lowing them"? Lowering the idle? Lowering the Virtual Torque?

---

I guess he meant lowering the cam sound like on gen 4 and 3 we would adjust the over and underspeed tables to control the sound of the cam on gen 5 I am not sure where that is.

Quote:

---

Originally Posted by Varto20

I guess he meant lowering the cam sound like on gen 4 and 3 we would adjust the over and underspeed tables to control the sound of the cam on gen 5 I am not sure where that is.

---

Gen V's can do this as well, it's just referred to as idle torque now. If you lower the idle area's of virtual torque for a cam, there is a likely chance you need to lower the idle torque stuff too.

Quote:

---

Originally Posted by TriPinTaZ

Gen V's can do this as well, it's just referred to as idle torque now. If you lower the idle area's of virtual torque for a cam, there is a likely chance you need to lower the idle torque stuff too.

---

Just looked it up under idle rpm speed control it does look like the over and underspeed from previous generations bUT which one is which there is an immediate and a predicted which one of them would actually give me control over how the my cam sound?

Quote:

---

Originally Posted by Varto20

Just looked it up under idle rpm speed control it does look like the over and underspeed from previous generations bUT which one is which there is an immediate and a predicted which one of them would actually give me control over how the my cam sound?

---

On the Gen V, Immediate typically refers to control by spark and predicted typically refers to control by throttle.

Ok that should clear things out thanks .