2015 Mustang GT Procharger throttle issue

[memphiss13]

Having a strange issue with a 2015 Mustang GT that I'm tuning. I'm not getting any surging or anything like that, but after a moderate to full throttle pull I'm getting some type of throttle limiting. In the attached log at about 40sec in you'll see the issue. I made a partial full throttle pull in 4th gear, let the car decelerate a bit, and then tried to reapply throttle. If you look at the log you'll see that pedal is increasing while throttle angle either doesn't move or barely moves. When this happens the torque source stays on "tip in limit". If I let the car decelerate back to idle rpm in neutral the throttle will behave normally after that until I recreate the same scenario.

Specs on the car:

2015 Mustang GT M6
D1SC
ID 1000's
BBK Longtubes

Dynoed 647whp/528ftlb sae @ 10psi


Hoping someone can shed some light on this. I haven't been tuning Ford's for long, so I'm still getting the hang of these things. Tune file and log attached.

[jchambers]

Tip-in torque limitation.

[tbrtuning]

Airflow -> General -> Managed Tip-In Switch set to 0 not 1. That's like the enable disable switch for the 2011-2014 that allows the tip in to be managed by the throttle. Change that to 0 and it should open the throttle right up.

[memphiss13]

Airflow -> General -> Managed Tip-In Switch set to 0 not 1. That's like the enable disable switch for the 2011-2014 that allows the tip in to be managed by the throttle. Change that to 0 and it should open the throttle right up.

Thanks. I had high hopes that it would be just that easy, but that didn't fix it.

[tbrtuning]

I'll look at a tune when I get a chance to see if I can find what you need to change.

[GHuggins]

Airmass limit under trans - set to 100 / airmass limit under tipin - set to 100 / Tq management - general - fuel cut and spark tq - make sure tipin disabled

That should take care of it, but who knows with these things

[murfie]

Your CLIP/ ADD mode is disabled and 1200 ft-lb maximum torque is too high. This situation is the sort of thing it exist for(Closed loop intervention prevention/ adaptive driver demand). Get a log with engine brake torque in it.

Enable it and set TQ maximum to something closer to the actual maximum TQ of the engine you see or would see on the dyno. From your DD table should be should be in the 530ft-lb area.

[GHuggins]

Murfie when you say clip / add mode is disabled - are you referring to the spark tip in and transients or something else? Just trying to learn more myself This might also explain why the OE tuners for Roush or whipple usually lower a lot of numbers instead of increasing them...

[tbrtuning]

I'm surprised just setting the managed tip in switch to 0 didn't fix it. I thought the airmass limits only made a difference when there was some kind of torque management going on. CLIP/ADD is an electronic throttle function and have seen plenty behave fine with it disabled but Murfie seems to know a lot about the functions in this ECU so that could be the ticket. Not sure what little difference you have making yours do that and others I've see not do it.

There are so many functions in these computers it is very easy to overcomplicate things.

[GHuggins]

Should have known that - got to over thinking it myself :/ OK Murfie - for blown applications which setting do you recommend setting this to? 3 or 2 enabled? I'm unclear of the difference In the two... I know the track ready version GT uses 3...

[murfie]

CLIP-ADD.PNG

The managed Tip-in switch was a good guess. The reason it didn't help is, as shown in the log, the throttle blade isn't even responding to pedal input. So an airflow Tip-in inst actually happening or needing to be managed. Pedal movement and no throttle blade movement is something in the electronic throttle tab as that is where the relationship is described. Very little was modified from stock here. CLIP/ADD was disabled maximum TQ was increased and the WOT torque values in DD were raised much higher than stock. Since this issue occurs in a stock area of the DD table it must be the CLIP-ADD not being able to prevent intervention and adapt the driver demand to abnormal RPM/Throttle input for acceleration.

[murfie]

3 leaving both enabled. Its a safety feature. If you accidentally cause a condition in which the ECU holds the throttle open when the pedal isn't commanding it then it can correct its self. Same if you are commandig thorttle and its not opening it can correct this condition safely.

[tbrtuning]

Hmm. I have noticed managed tip in displays a different source. Driver Demand source or something like that.

So if the torque model, driver demand, and throttle body are setup close with very little error is that how you can get by with having the clip disabled and the car still drive well?

[GHuggins]

Murfie, do you know what all of the different settings in the clip/add stand for by chance? 2 different enables and disables?

[murfie]

Both disabled
CLIP disabled / ADD enabled
CLIP enabled / ADD disabled
Both enabled

Not sure about the order of the middle two.

Yes, having accurate data and not relying on the CLIP or ADD is how it works with out it. Stock tunes are pretty accurate and only use this if there's a physical/ electrical problem.

[SultanHassanMasTuning]

clutch protection as well, i would increase that

[17GT]

Having a strange issue with a 2015 Mustang GT that I'm tuning. I'm not getting any surging or anything like that, but after a moderate to full throttle pull I'm getting some type of throttle limiting. In the attached log at about 40sec in you'll see the issue. I made a partial full throttle pull in 4th gear, let the car decelerate a bit, and then tried to reapply throttle. If you look at the log you'll see that pedal is increasing while throttle angle either doesn't move or barely moves. When this happens the torque source stays on "tip in limit". If I let the car decelerate back to idle rpm in neutral the throttle will behave normally after that until I recreate the same scenario.

Specs on the car:

2015 Mustang GT M6
D1SC
ID 1000's
BBK Longtubes

Dynoed 647whp/528ftlb sae @ 10psi


Hoping someone can shed some light on this. I haven't been tuning Ford's for long, so I'm still getting the hang of these things. Tune file and log attached.

So it's been a long time since this issue but I ran across it and figured I would give the solution because someone out there will probably have it. Your Map Max Delta Above BP is not set up correctly. You could zero out all your numbers and set the rows to like 5k and this will fix the issue. As your manifold pressure is exceeding the max values you have set it's causing the calculation to be out of wack hence the loss of throttle when you go into Optimum power.

[17GT]

….correction you can go into optimum power but upon letting up on the throttle this is what you will experience.


2017 Mustang GT

Vortech V3si
DW 98lb
BBK LT
Dynoed 720whp/576ftlb