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Author Topic: Air conditioner idle speed  (Read 3803 times)

Gene

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Air conditioner idle speed
« on: August 11, 2009, 01:09:00 PM »

From my earlier Capris, I seem to remember that when the air conditioner kicked in, the idle speed would pick up to hold a relatively smooth idle with the additional A/C load. The '94 NA automatic I now have does not change idle speed when the A/C kicks in. Am I remembering right? Are there a set of checks for this? I couldn't find anything in the service manual that referenced this.
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\\\'94 Capri Red automatic.

Gene

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Air conditioner idle speed
« Reply #1 on: August 13, 2009, 08:04:00 AM »

Hmmmmm. Maybe I just imagined this. Anybody?
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\\\'94 Capri Red automatic.

CapriTypeR

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Air conditioner idle speed
« Reply #2 on: August 13, 2009, 11:05:00 AM »

From what I remember, my earlier Capris kicked up the idle, as well. The AC does not work in the Super Roo, I couldn't tell you if it does it or not!  As long as it doesn't make the car stall, it shouldn't matter, I would think!

--Russ
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aciddrop28

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Air conditioner idle speed
« Reply #3 on: August 13, 2009, 09:46:00 PM »

I have noticed this. Mine will go up for a few seconds but then it will go back down to regular speed again. I guess because it takes more effort to build the momentum and once thats over, it takes less energy to keep it going?
it also does this with the head light switch for some reason? haha
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1984 Camaro- 3.73 rear, b&m short shifter

CapriTypeR

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Air conditioner idle speed
« Reply #4 on: August 14, 2009, 05:50:00 AM »

The Super Roo does this as well, with the headlight switch!  The load put on the alternator when you operate the headlights is what causes it, I believe.

--R
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Gene

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Air conditioner idle speed
« Reply #5 on: August 15, 2009, 10:51:00 AM »

The idle speed drops off far enough with the A/C load that the idle is very rough. It's down to ~700 rpm or so. Just feels like crap, mostly - doesn't stall, but it's really rough.
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D.Smith

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Air conditioner idle speed
« Reply #6 on: November 11, 2009, 06:53:00 AM »

I would think the ECU would notice the drop in idle and compensate.
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