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12-02-08, 10:14 PM
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#1 (permalink)
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250+ Club
Join Date: Oct 2007
Location: Tucson
Posts: 434
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what is the A/C idle solenoid..also any other a/c stuff i should know
im getting ready to fix the a/c in my 60. I bought a new dryer and a used a/c pump off a wrecked low mileage 60. I just desmogged my truck, and put all smog/vac line stuff in a box. I recently came across a write up mentioning the AC idle solenoid. I assume I removed it when i did the desmog. Before I start on my a/c project I would like to get all the inexpensive parts on hand so I don't go back and forth with it.
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12-03-08, 07:01 AM
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#2 (permalink)
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Forum Lifer
Join Date: Aug 2004
Location: San Francisco Bay Area
Posts: 3,411
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It is a diaphragm mounted on the front of the carb that turns up the idle when you turn on the AC. There is a solenoid mounted on the driver side fender which gets vacuum from the intake manifold right next to where the brake booster gets its vacuum. The solenoid opens the valve when you turn on the ac and sends vacuum to the diagram that turns up the idle which is adjusted with a small screw on the linkage on the carb to raise or lower the idle.
__________________
1982 FJ60 SUA OME w/AAL's, 34's, H55F, 4.7 toybox
Northern California
TLCA/PMC Member
"He who throws mud only loses ground."
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12-03-08, 09:52 AM
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#3 (permalink)
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250+ Club
Join Date: Oct 2007
Location: Tucson
Posts: 434
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Quote:
Originally Posted by NocalFJ60
It is a diaphragm mounted on the front of the carb that turns up the idle when you turn on the AC. There is a solenoid mounted on the driver side fender which gets vacuum from the intake manifold right next to where the brake booster gets its vacuum. The solenoid opens the valve when you turn on the ac and sends vacuum to the diagram that turns up the idle which is adjusted with a small screw on the linkage on the carb to raise or lower the idle.
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do you know if there is any way to run that with my weber?
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12-03-08, 10:42 AM
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#4 (permalink)
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Forum Lifer
Join Date: Aug 2004
Location: San Francisco Bay Area
Posts: 3,411
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Quote:
Originally Posted by mp_cude
do you know if there is any way to run that with my weber?
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I am pretty certain there is not a diaphragm like the stock one on a weber. Maybe someone that has a weber can tell you what they did. I am guessing they just set the idle higher than normal.
__________________
1982 FJ60 SUA OME w/AAL's, 34's, H55F, 4.7 toybox
Northern California
TLCA/PMC Member
"He who throws mud only loses ground."
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12-03-08, 02:07 PM
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#5 (permalink)
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250+ Club
Join Date: Mar 2005
Location: Memphis, TN
Posts: 825
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Can someone tell me why this (idle up) is needed to run the A/C?
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89 FJ62- w/ an H42 and other stuff
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12-03-08, 05:12 PM
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#6 (permalink)
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Rum Runnin'
Join Date: Apr 2005
Location: Usually Upstate NY
Posts: 5,215
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Quote:
Originally Posted by Bryan062087
Can someone tell me why this (idle up) is needed to run the A/C?
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I believe it's to get the AC compressor running at the right RPM for maximum cooling.
Anyone have a picture or the part number of the AC solenoid?
__________________
Johnny C
1987 FJ60 - MoonShine - SROR Front Bumper, H55f, 2-low, SOA, 62+AAL fronts w/ Ironman rears, 36's, FF w/ 4.11's, Round Eyes, KMR's Tailgate Hatch, desmog + headers, Storage / Sleeping system, etc. -- DD w/242k
Waiting to be installed:
York 210 OBA, shocks, lots of little things....
1967 Stevens Mfg. Co M416 - almost RUST FREE!!!
Previous Rig:
1987 FJ60 - Big Red
ΦΚΤ - Fall 06
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12-03-08, 06:04 PM
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#7 (permalink)
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Forum Regular
Join Date: Jun 2004
Location: Grand Rapids, MI
Posts: 201
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Quote:
Originally Posted by Bryan062087
Can someone tell me why this (idle up) is needed to run the A/C?
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It's not needed to run the A/C, but rather to keep the engine from stalling when the compressor kicks on and puts a load on the idling engine.
__________________
'87 FJ60 rust free & stock
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12-03-08, 08:25 PM
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#8 (permalink)
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Site Addict
Join Date: Nov 2004
Location: Granbury, Texas
Posts: 1,416
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The compressor works (cools) better at 900-1000 rpms (the idle up setting) than at the 600 rpm regular idle setting.
__________________
Scott
Granbury, TX
1987 Beige FJ60.
One clean cruiser.
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NocalFJ60
Moonshine
