Edelbrock Pro-Tuner, User Manual

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4.3.8 A/C Load Compensation
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A/C Load Compensation
A/C Load Compensation
Insure that the ECU input wire for A/C clutch sensing is correctly configured before
continuing.
Note: When wiring A/C load compensation, Pin M (PCM80) / Pin A
(ECM48) in expansion connector must be pulled to ground when A/C
compressor is energized.
Load compensation is available for the purpose of preventing or minimizing RPM droop
when a load is put on the engine such as when an air conditioning compressor turns on.
There are two tables in the drop down list for this function. They are called, "
Load Comp
IAC Ofst " and " Load Comp Spk Ofst ". The Load Comp IAC Ofst applies an offset to the
Idle Air Control valve to supply extra air when the load is applied. The Load Comp Spk
Ofst provides an extra few degrees of spark advance to also minimize speed loss or
stalling during a load switch. Both tables are a function of throttle position in percent.
Tips for tuning:
These tables are also available together under the Tools menu when connected for easy
tuning. You can set the polarity of the switch if needed.