AC Idle 95 tracker

[jmcquaid]

My tracker has an aftermarket AC system and no AC amp. Does anyone know how the ECU gets the message to increase the idle speed? I see a wire yellow/black from the JTGH's very AC helpful diagrams. Does anyone know if that is to disable the AC or to bump up the idle? Also what signal is appropriate to check.... I hate to guess and damage my ECU.

Bottom line is I need the idle bumped up when the AC is running it stalls my engine.

John

[jtgh]

that is a very good quesiton.

this is the high idle line,

Ive never played with it. much.

but.....

on my 8-valve ecu its pin A2 , I can tell you that this pin is pulled up to 12vdc inside the ECU. and if you ground it , you may get your desired results.

just dont short this pin to battery 12v ,

you could put a small relay on that line and when you throw the A/C on the relay energizes and closes this line A2 to ground. (can give schematic)
but try it, by just grounding A2 pin . (8v pin ,no 16v? , which head do you have//?)
cheers

[jmcquaid]

Thanks very much I will give it a try this evening.

[jmcquaid]

Originally Posted by jtgh

that is a very good quesiton.

this is the high idle line,

Ive never played with it. much.

but.....

on my 8-valve ecu its pin A2 , I can tell you that this pin is pulled up to 12vdc inside the ECU. and if you ground it , you may get your desired results.

just dont short this pin to battery 12v ,

you could put a small relay on that line and when you throw the A/C on the relay energizes and closes this line A2 to ground. (can give schematic)
but try it, by just grounding A2 pin . (8v pin ,no 16v? , which head do you have//?)
cheers

Jerry you were correct, I setup a test rig and when a ground is placed on this line the idle jumps right up. I will need to wire in a relay this weekend to work off of the AC 12v switched source. I have your schematic from a previous discussion and the wiring of the relay is no big thing.
Thanks for your assistance!
J

[jtgh]

your velcome