Stock L83 running vintage air, cooling fans aren?t tied to the pcm in anyway. Having idle issue when the a/c and fans come on. Idle drops too low and Struggles the engine. Is there anyway to get an IAC bump or anything on these PCM?s?
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Stock L83 running vintage air, cooling fans aren?t tied to the pcm in anyway. Having idle issue when the a/c and fans come on. Idle drops too low and Struggles the engine. Is there anyway to get an IAC bump or anything on these PCM?s?
In hp tuner there's a way to adjust idle with AC on. Under engine>idle>base idle
Open that table and you will see the idle settings with AC on in gear and in park.
The Ac request is a CANBUS based message to the ECU. You will need something like THIS AC request module to tell the GM ECU that the AC is requested. You may also need to wire in a GM AC high side pressure sensor.
I used swaptime’s muscle car module and a gm low pressure sensor. Also does tapshift and a few other things for about the same price as the part listed above. Works like factory.