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View Full Version : Injector scaling and limp mode



Patryn999
17-06-2012, 04:39 AM
Just a quick question, I nuked my rear turbo and ran the impeller through most of my intake, so have stripped everything off and decided to put larger injectors in while it's mostly disassembled (/backstory)

Anyway, have done that and tried to reprogram injector scalings but to no avail. Can change between 388 -> 1050 with less than 0.1AFR difference in mixture. Although for a short while (5-10 mins) I freaking swear it worked at the correct 550cc scaling then stopped. Checked temp etc. but that's all reading fine. Tried resetting ECU, cold vs hot and charging battery (initially thought it was a latency vs voltage issue, but no).

Address used: 10306, also tried adjusting injector latencies but to no avail - even high load, low RPM sinks below 9:1 with setting at "1050"cc and 550cc injectors. Using kenneth's rom V1.03, and using the search seems to indicate that the address is the correct one.

Wondering if anyone with larger injectors can unplug their maf and tell me whether the scaling works for them?

Kenneth
17-06-2012, 06:33 AM
You might find the following useful:



<scaling name="Time_uSec2" units="uSec" toexpr="x" frexpr="x" format="%.0f" min="0" max="255" inc="1" storagetype="uint8" endian="big"/>
<table name="Injector Dead-Band Coeff" category="INJECTORS" address="10301" type="1D" scaling="Time_uSec2"/>

<scaling name="IPW_min16" units="mSec" toexpr="x*0.256" frexpr="x/0.256" format="%.3f" min="0" max="65.536" inc="0.256" storagetype="uint16" endian="big"/>
<table name="Injector Min. Pulse Width" category="INJECTORS" address="10302" type="1D" scaling="IPW_min16"/>

<scaling name="Rpm8000" units="RPM" toexpr="x*31.25" frexpr="x/31.25" format="%.0f" min="0" max="8000" inc="31.25" storagetype="uint8" endian="big"/>
<table name="RPM Cut-off for Min. Pulse Width" category="INJECTORS" address="10305" type="1D" scaling="Rpm8000"/>

<scaling name="InjectorLatency" units="mSec" toexpr="x*0.024" frexpr="x/0.024" format="%.3f" min="0" max="4" inc="0.024" storagetype="uint8" endian="big"/>
<table name="Injector Battery Voltage Latency Compensation" category="INJECTORS" address="115a2" type="2D" scaling="InjectorLatency">
<table name="Battery Voltage" address="2ceb0" type="Y Axis" elements="7" scaling="BatteryVoltage"/>
</table>

Kenneth
17-06-2012, 06:35 AM
Those are the addresses which are matched to a known working definition for Evo5/6.