Lean condition with Fuel source #3 during shifts at WOT

European strategy specific for 2004 ford mustang euro spec but also modified by SVT and used on the 03/04 cobra. Can be used on all 2002-2004 mustang v8 and v6 manual and automatics. Supports automatic 4r70w control. Can be used on 2001-2004 ford F-150 4.6 / 5.4 ecu's if configured correctly as well.
Denver_SVT
Posts: 25
Joined: 2021 Feb 25, 16:39
Location: Denver, Colorado
Vehicle Information: 2001 Mustang Roush Stage 3 Supercharged with Build Engine

Lean condition with Fuel source #3 during shifts at WOT

Unread post by Denver_SVT »

What will cause the Fuel source to switch from 5 to 3 (Cylinder cutout-Stabilized - STFT controlled by torque control feature) during shift from 3rd to 4th gear at WOT which cause the AFR to go lean?
decipha
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Re: Lean condition with Fuel source #3 during shifts at WOT

Unread post by decipha »

torque modulation or torque truncation
Denver_SVT
Posts: 25
Joined: 2021 Feb 25, 16:39
Location: Denver, Colorado
Vehicle Information: 2001 Mustang Roush Stage 3 Supercharged with Build Engine

Re: Lean condition with Fuel source #3 during shifts at WOT

Unread post by Denver_SVT »

Ok why this happened?

The car run fine all the time with good datalog monitoring. Only this time accured after multiple abuse with hard shifting 3rd to 4th continously. Can a fuel pumps about to fail cause this to happen as fuel prssure get dropped at high rpm? As i can see the Inj pulse width B1 and B2 get dropped from 4500 to 2300 and car get spike lean with fuel cutout and engine shutting down.
decipha
Posts: 2911
Joined: 2021 Feb 15, 12:23
Location: New Orleans, LA
Vehicle Information: 10x Supercoupes
Lincoln LS 5spd
Ls1 t56 ss camaro
Whippled Harley Truck
gmc 2500hd classic
gt40p explorer
Marauder
Chrysler 300 AWD hemi
3.5 Explorer

Re: Lean condition with Fuel source #3 during shifts at WOT

Unread post by decipha »

Only you as the tuner can tell us why. Must be something you have setup to do as I've never encountered this problem before.
Denver_SVT
Posts: 25
Joined: 2021 Feb 25, 16:39
Location: Denver, Colorado
Vehicle Information: 2001 Mustang Roush Stage 3 Supercharged with Build Engine

Re: Lean condition with Fuel source #3 during shifts at WOT

Unread post by Denver_SVT »

Ok Decipha fair enough. So, getting back to my main question is why Fuel source will go to #3 which is "Cylinder cutout-Stabilized - STFT controlled by torque control feature", and if i understand you right that this is something to do with (torque modulation or torque truncation). Therefore, I haven't touched those tables at all. So, do I have to do something with them or leave them as it is?
decipha
Posts: 2911
Joined: 2021 Feb 15, 12:23
Location: New Orleans, LA
Vehicle Information: 10x Supercoupes
Lincoln LS 5spd
Ls1 t56 ss camaro
Whippled Harley Truck
gmc 2500hd classic
gt40p explorer
Marauder
Chrysler 300 AWD hemi
3.5 Explorer

Re: Lean condition with Fuel source #3 during shifts at WOT

Unread post by decipha »

if its hitting them then you need to move them out the way if you don't want to hit them
Denver_SVT
Posts: 25
Joined: 2021 Feb 25, 16:39
Location: Denver, Colorado
Vehicle Information: 2001 Mustang Roush Stage 3 Supercharged with Build Engine

Re: Lean condition with Fuel source #3 during shifts at WOT

Unread post by Denver_SVT »

How to tell if i already hit them? which parameter will monitor them?
do i have to just raise the numbers by 10-20% and call it done and see how it will act? or this is wrong
decipha
Posts: 2911
Joined: 2021 Feb 15, 12:23
Location: New Orleans, LA
Vehicle Information: 10x Supercoupes
Lincoln LS 5spd
Ls1 t56 ss camaro
Whippled Harley Truck
gmc 2500hd classic
gt40p explorer
Marauder
Chrysler 300 AWD hemi
3.5 Explorer

Re: Lean condition with Fuel source #3 during shifts at WOT

Unread post by decipha »

I dont know I've never hit them before.

What is the full vehicle details?
Denver_SVT
Posts: 25
Joined: 2021 Feb 25, 16:39
Location: Denver, Colorado
Vehicle Information: 2001 Mustang Roush Stage 3 Supercharged with Build Engine

Re: Lean condition with Fuel source #3 during shifts at WOT

Unread post by Denver_SVT »

New Edge Mustang 4.6 2v Supercharged with FBOs.
Mods: MMR Shortblock 900, DSS racing pistons with Manley H beam rods, 03-04 cobra crank shaft, compression ratio 9.7, F1-A procharger with smaller pulley at 20 psi, Edelbrock Jr Intake with 6061 pleanum and 75mm TB, Return Fuel system Division X dual pumps, MHS stage 3 heads with custom stage 4 blower camshaft to 7200 rpm, stainless works LT headers with x pipe and catback, 3.55 gears, Snow performance stage 2.5 water/methanol injection 50/50
Denver_SVT
Posts: 25
Joined: 2021 Feb 25, 16:39
Location: Denver, Colorado
Vehicle Information: 2001 Mustang Roush Stage 3 Supercharged with Build Engine

Re: Lean condition with Fuel source #3 during shifts at WOT

Unread post by Denver_SVT »

Tune for MS-109 and methanol with 21 degrees of timing and tune for pump gas with methanol at 17 degrees of timing. RPM Red line at 6900. NGK BR7Es gapped at 0.023
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