Hello RomRaider Gurus!
Hoping to find some answers related to the feasibility of tuning out the WOT fuel cut that plagues 4EAT models. My 2011 USDM FXT AT (VF52) gets audible WOT upshift knock when the ECU either partially or completely closes the injectors during upshifts. Attached is a short log segment showing the behavior. I have defined the timing retard on shift table, which is why timing goes to 0*.
Attachment:
AT Commanded Fuel Cut.csv
Over dozens of logs, the car sometimes does nothing, only reduces fueling ~25%, or reduces fueling 100%. Since the fuel cut varies under similar conditions, I'm under the impression there may be a 2D or 3D table controlling how the ECU responds when it gets the loggable TCU fuel cut request:
Quote:
<switch id="S51" name="Fuel Cut Signal From AT" desc="S51" byte="0x000068" bit="2" ecubyteindex="26" target="1" />
Is someone proficient in disassembly willing to take a moment to look and see if there is a table, or if this will require a code patch? Attached are the stock ROM, log, and definition for the Timing Compensation Retard on Shift which may help trace the fuel cut logic. Should a table exist, then there's hope for defining it in ScoobyROM for other models fairly easily.
Quote:
<table name="Ignition Timing Compensation Retard on Shift" address="d2204">
<table name="Accelerator Pedal Angle" address="d21e8"/>
</table>
Sincerely appreciate this community, any clarity on this would be welcome!
-Nick
