This should be fun (and ultimately confusing).

Who wants to try and explain each field? :D

<BLOCKQUOTE>code:<HR><PRE>
ECM Switch Table
------------------
VATS Select
VATS Diagnostic
Knock Diagnostic
Vehicle Speed Diagnostic
EGR Diagnostic
MAF High Diagnostic
Base P.W. Calibration Method (X = Calc.)


ECM Constants
-----------------
Fuel Cut Off, (Speed)
Fuel Resume (Speed)
Fuel Cut Off, (Engine Speed)
Fuel Resume (Engine Speed)
Fan Off Coolant Temp Threshold (A/C On)
Fan On Coolant Temp Threshold (A/C On)
Fan Off Coolant Temp Threshold (A/C Off)
Fan On Coolant Temp Threshold (A/C Off)
Injector Flow Rate, (Single Fire)
Injector Flow Rate, (Double Fire)
Max Accel Enrich. Async Pulse Width
Minimum Delta TPS For Accel. Enrich
Minimum Delta LV8 For Accel. Enrich
EGR Off (TPS)
EGR On (TPS)
TCC Unlock Speed (Low Gears)
TCC Lock Speed (Low Gears)
TCC Unlock, Speed (Higher Gears)
TCC Lock Speed (Higher Gears)
TCC Unlock Prevent/Auto O/D Engage Speed
Shifter Kickdown Prevent RPM Threshold
TPS Kickdown/TCC Unlock Prevent-1st Gear
TPS Kickdown/TCC Unlock Prevent-Not 1st Gear
Maximum Spark Retard (Not in WOT)
Hot Engine O2 Timer
Warm Engine O2 Timer
Cold Engine O2 Timer
Idle Speed Adder in Park/Neutral
Idle Speed Adder for A/C On
Maximum BLM Value
Minimum BLM Value
MAF High Diagnostic (Error 33) Threshold
PROM ID


ECM Variables
---------------
Spark Advance vs. RPM vs. Load
Spark Advane in WOT vs. RPM
Maximum Knock Retard, (in WOT)
WOT % Change to Fuel/Air Ratio vs. Coolant Temp
WOT % Change to Fuel/Air Ratio vs. RPM
% TPS to Enable WOT vs. RPM
Open Loop FUel/Air Ratio % Change vs. Coolant Temp
Open Loop FUel/Air Ratio % Change vs. Load
Warm IAC Park (Steps) vs. Coolant Temp
Closed Loop IAC Target RPM vs. Coolant Temp
Mas Air Flow #1
Mas Air Flow #2
Mas Air Flow #3
Mas Air Flow #4
Mas Air Flow #5
Mas Air Flow #6
BPW Fuel vs. Load (msec)
Injector PW Correction vs. Battery Voltage
Accel. Enrich % BPW Factor vs. Async Pulse
No. of Accel Enrich Async Pulses vs. Coolant Temp
Accel Enrich. Async Factor vs. Coolant Temp
LV8 Accel. Enrich. Factor vs. Delta LV8
LV8 Accel. Enrich. Coolant Factor vs. Coolant Temp
LV8 Accel. Enrich. Decay Rate vs. Coolant Temp
Crank Fuel Multiplier vs. Reference Pulses
TCC Unlock Speed vs. % TPS (not in 4th)
TCC Lock Speed vs. % TPS (not in 4th)
TCC Unlock Speed vs. % TPS (In 4th)
TCC Lock Speed vs. % TPS (In 4th)
Fan PWM Duty Cycle vs. Coolant Temp
</PRE>[/QUOTE]


[Modified by scorp508, 12:51 PM 10/17/2002]

 

:crazy:

 

The ECM switches are simple on or offs. The constants use single values.

"VATS Select" - Tells the ecm whether to be looking for a VATS module signal or not.

Somebody else grab next one and explain.

 

Fan Off Coolant Temp Threshold (A/C On)use this field to set cooling fan to off to desired temp while A/C is running (example 77%C)

Fan On Coolant Temp Threshold (A/C On) use this field to set cooling fan to come on to desired coolant temp while A/C is running (example 80%C)

Fan Off Coolant Temp Threshold (A/C Off)use this field to set cooling fan to off to desired temp while A/C is off (example 77%C)

Fan On Coolant Temp Threshold (A/C Off) use this field to set cooling fan to come on to desired coolant temp while A/C is off (example 80%C)

Frank :flag

 

Pretty much need to discover and sort them out on your own. Many of them I never bother with