wade70ss

I am running a 2001 Tahoe 5.3 in my 70 Chevelle with DBW. I currently have Vintage Air running external from my PCM but desperately need the idle to react to my A/C operation. What do I need to make this happen?

What pin on the PCM do I need to tap?

What do I need to send to that pin? (12V or GND)

garys 68

iTrader: (1)

Why do you need AC request with aftermarket air? My Vintage and Classic are operating without AC request to ecu. Idles fine, runs great, stays cold.

wade70ss

When my A/C compressor engages the idle does not adjust for the load. Often my vehicle's idle dips below 500rpm and dies. Sometimes it adjusts. However with the cam, more often then not it will die.

SA_swaps

C2 Red pin 17 dark green and white wire.

sweetk30

ya thats cool but what do you do with it ?

SA_swaps

It needs to see voltage when the compressor is Engaged. You can hook it to the binary switch of the vintage unit mounted on the dryer.

rock-rod

by any chance, has someone figured this out with the later blue/green connectors?

motor doesn't stall, but it would be nice to have it bump the idle just a hair when the a/c clutch cycles on.

wade70ss

Ok, so I attempted this suggestion Saturday however this did not work. I set the A/C on idle 200 RPM higher than base idle just to ensure it would be noticeable. Nothing happened.

Is there anything else the computer must see for this operation to happen properly?

SA_swaps

c2 55 goes to the cycling switch it is looking for a ground.