does the A/C use the stock computer for anythng
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From: Mass
Engine: 350 TPI
Transmission: A4
Axle/Gears: 3.23
does the A/C use the stock computer for anythng
Just need to know if the stock computer is wired into the A/C system at all. I didtched my computer and all the wiring attached to it and replaced it with a FAST ECU and wiring harness. I want to put A/C back in my car and need to figure out the wiring part of it now.
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From: AL,USA
Car: 1990 Formula
Engine: 95 LT1
Transmission: T56
Axle/Gears: Weak 7.5 with 4.10s
The A/C sends a signal to the stock ECM to tell the engine to idle up under load. This also kicks on your second fan. I recently finished A/C on my LT1 and I forgot the wire that sends the signal. My car will actually die at a stop light and surges everytime the compressor cycles
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From: Tampa, FL, USA
Car: 93 240SX
Engine: LQ9
Transmission: T56
Axle/Gears: 3.54 R200 IRS
Originally Posted by bingo
The A/C sends a signal to the stock ECM to tell the engine to idle up under load. This also kicks on your second fan. I recently finished A/C on my LT1 and I forgot the wire that sends the signal. My car will actually die at a stop light and surges everytime the compressor cycles
Might want to check out your IAC, it should more than be able to compensate, the one LT1 swap i've done that I hooked up the a/c for had no problem with the idle when the comp cycled.
Bottled: your ecu may have an input, if not heck even if so, i'd bet it will compensate on its own.
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