HOW DO I CHANGE THE PARK POSITION OF THE IAC VALVE OR TAKE CONTROL OF IT FOR DIAGNOSTICS ? ?
1990 CAMARO L98 1227730 ECM
TUNERPRO RT V 5.00
IS COMMAND / CONTROL OF IAC VALVE POSSIBLE ?
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IS COMMAND / CONTROL OF IAC VALVE POSSIBLE ?
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Command the IAC
Yes you can Override the ECM Commanded IAC via Mode 4.
A Tech-1 or Tech-1A can over ride the commanded IAC via controlling the Idle Speed or IAC Position. This uses a Mode 4 string of command. I tried to issue a Mode 4 command in Tuner Pro but it didn't allow enough hex values to be written. I did ask TP for more space but I haven't checked back to try TP. (I just use a Tech-1.)
Read the other post on the 95 Truck, I responded to your changing the park position.
A Tech-1 or Tech-1A can over ride the commanded IAC via controlling the Idle Speed or IAC Position. This uses a Mode 4 string of command. I tried to issue a Mode 4 command in Tuner Pro but it didn't allow enough hex values to be written. I did ask TP for more space but I haven't checked back to try TP. (I just use a Tech-1.)
Read the other post on the 95 Truck, I responded to your changing the park position.
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