Cliff's Quadrajet Parts and Rebuild Kits
General Category => Quadrajet Carb Talk and Tips => Topic started by: Turbo26T on February 17, 2026, 12:54:57 PM
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My project car will have A/C.. Im looking for an idle-speed solenoid for my Quadrajet with enough force to open the throttle at idle when the compressor comes on .Factory Q/Jet idle stop solenoids only extend after the throttle is opened and do not have enough force . This would lead to stalling unless you blip the throttle.
Any thoughts , real world examples ,SWAG's etc..
Thanks ,
Stan
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It would help knowing the carb-# and application.
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Kenth : Its a #17082224 ..but I've tried factory Q/Jet idle-stop/idle-speed solenoids and they are not strong enough to open the throttle from curb idle . ..Only after the throttle is opened , will the factory solenoid extend and hold idle speed at an increased RPM. As I understand it , they were used to retract after the ign is turned off to completely close the throttle plates to negate "Dieseling"
What I'm looking for is a solenoid that has enough force to increase idle speed when the A/C compressor comes on without having to blip the throttle pedal...Either a vacuum or an electric (12V) solenoid can be made to work..
Hopefully this may clarify what I'm trying to accomplish..
Stan
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Normally, the idle speed is set with the solenoid active, A/T gear engaged and AC on.
No further increase in speed for AC on should be necessary.
With the solenoid inactive, the speed is set 100-150 rpm lower.
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Kenth : Thanks for your input...I , however , am well versed in solenoid operation in regards to throtte speed increase ..No offense intended , but Im not wanting to know how they operate , setting procedure , wiring diagrams , etc
I am simply looking for a solenoid strong enough to open the throtte against the return spring pressure and increase the RPM's when the A/T is in gear , when the A/C compressor comes on @ Idle....
Thanks again for your input
Stan