Ford Raptor Wont Richen up past 3800 rpm

[S2H]

so I have a Ford Raptor on the Dyno...
and every thing is decent part throttle...

when we go WOT, about 3800 RPM (EVERY TIME) the fuel starts to lean out....and I cannot seem to richen it up
cant find what table is messing with the fueling keeping it from being able to enrich the fuel
Not sure if we are just missing something simple...or possibly missing one parameter that has some variable wee need to change....


Commanded AFR is Fine...stays right where we command it to be.

the Truck has a Procharger Kit...6-8 PSI total
Has 60 lb injectors...tested and flowed on our Injector machine
Fuel Pressure is being Logged on the dyno, and it stays Stable at 58-60 ish (and it has a Brand new Walbro 465 pump in the tank)
Its making about 320 HP to the tire on our MD-1750 Mustang Dyno



*Problem Solved... Files Removed from this post*

[Eric@HPTuners]

Torque Source shows Trans Trunc, so it is cutting power for some reason there. I didn't look over your tune, but make sure all the torque limits have been raised up.

[S2H]

Torque Source shows Trans Trunc, so it is cutting power for some reason there. I didn't look over your tune, but make sure all the torque limits have been raised up.

please actually look at the tune...
tell me what I am missing...

[ElecTech]

I know this is a different kit (and platform) but I recently went three rounds with a Mustang equipped with a Vortech kit doing the exact same thing and the issue ended up being the MAF location due to the customer installing it in the wrong location in the intake. The MAF was stalling at a certain airflow everytime. It happened to be about 4000-4500 rpm, but It would not respond to anything. It had ID1300's and FORE dual pump return system using twin Walbro 400's. So, I know I had plenty of fuel to work with. Changed the MAF location to a straight pipe section after the filter and everything was was solved. I questioned myself and lost sleep for weeks.

Now all I need are some ETC and Torque logging DMRs and I can get the drivability squared.

I feel your pain, but maybe this will help.

[ElecTech]

To add, the scanner values never really indicated much of an airflow deviation before I got out of it due to extremely lean readings. The A/F went lean in a very linear and predictable manner that would overlay perfectly run to run no matter how much I tried to fatten it.

[S2H]

Torque Source shows Trans Trunc, so it is cutting power for some reason there. I didn't look over your tune, but make sure all the torque limits have been raised up.

disabled the torque truncation...no change...

[Eric@HPTuners]

From the tune file you posted....

Trans > Torque Management > General > Torque Truncation is ENABLED

Truncation vs. Gear still has stock values

TCC Torque Truncation has stock values

Torque Reduction Master and Shift are both enabled as well.

I'd start by changing all of those things.

[S2H]

From the tune file you posted....

Trans > Torque Management > General > Torque Truncation is ENABLED

Truncation vs. Gear still has stock values

TCC Torque Truncation has stock values

Torque Reduction Master and Shift are both enabled as well.

I'd start by changing all of those things.

new Tune and Log Up... still no change....

Tried all the things you just suggested

[Eric@HPTuners]

Couple of things....

The torque truncation is now gone, but according to the wideband it is still going lean. Can you log the Short Term Fuel Trims to see if the closed loop control is trying to fix the leanness. It doesn't appear to be commanding leaner, so I would bet that the trims are trying to combat this, if that is a case you have a fuel delivery issue.

[Eric@HPTuners]

I just looked a bit further... CylAir WOT Multiplier and Cylair Max Multiplier are stock. Raise those up.

[S2H]

I just looked a bit further... CylAir WOT Multiplier and Cylair Max Multiplier are stock. Raise those up.

how far should I raise them....



and I know it has enough fuel pump and plenty of injector left...
its in open loop...no fuel trims... already checked that.

[Higgs Boson]

I just looked a bit further... CylAir WOT Multiplier and Cylair Max Multiplier are stock. Raise those up.

is there a guide on some of these ford limiters? I see them maxed out on some tunes and bumped slightly on others. at what point is is necessary to raise them and does it hurt to raise them if it's not needed? what are the symptoms, etc? is all this in the coyote book?

[S2H]

ok... So raising the CylAir WOT Multiplier and Cylair Max Multiplier...has helped......

all I have to say..... is that FORD does some stupid shit in their Tunes......

seems that it was limiting the maximum calculated cylinder air.....
why somebody would do that is beyond me... I would think you would want it to always calculate everything...and not have a max limit unless there was a MAF failure of some sort.

[S2H]

So this was the Culprit...
stock values are 1.10 and 0.95

Raised them both up to 2.0

plenty of fuel now...
also, now it calculates the Manifold pressure correctly ...shows the 7-8 psi it makes
and the Air load now reads more than 1.05.....as it should

[Eric@HPTuners]

is there a guide on some of these ford limiters? I see them maxed out on some tunes and bumped slightly on others. at what point is is necessary to raise them and does it hurt to raise them if it's not needed? what are the symptoms, etc? is all this in the coyote book?

Pretty sure this is covered in the book.

[96gt4.6]

Pretty sure this is covered in the book.

I believe so as well. I know they go into great detail on boosted applications in the Cook Book, it was very helpful for me even being N/A on the Coyote.

[Eric@HPTuners]

Those two multipliers have been in every Ford calibration back to the EEC-IV, and they must be raised up on boosted applications else you run into this issue.

[S2H]

Those two multipliers have been in every Ford calibration back to the EEC-IV, and they must be raised up on boosted applications else you run into this issue.

might be a good thing to put this in the comments in the Editor when you mouse over them....

[Eric@HPTuners]

might be a good thing to put this in the comments in the Editor when you mouse over them....

One of these days I will go through all the parameters that were created in the past and make sure the descriptions are as accurate as possible.