Idle solenoid recommendations
Thread Starter
Instructor
Joined: Sep 2018
Posts: 165
Likes: 64
From: Lakeville MN
Idle solenoid recommendations
Just finished installing the factory air Conditioning system on a 79 4 speed, now I need an idle solenoid for the carb, under the load of the compressor the engine idle drops so low I'm afraid it will stall at a stop light. I have an Edelbrock performer 1406. Reviews online for these things are all over the place, any recommendations?
Safety Car
Joined: Jun 2004
Posts: 4,372
Likes: 223
From: Beecher Illinois
Just an fyi.
Factory 79s with AC and manual trans did not use the solenoid to increase the idle.
I guess the factory idle speed of 900 rpm(L82) versus 600 for the automatic was enough to keep from bogging down the motor. L48 was 700 and 500 rpm.
Factory 79s with AC and manual trans did not use the solenoid to increase the idle.
I guess the factory idle speed of 900 rpm(L82) versus 600 for the automatic was enough to keep from bogging down the motor. L48 was 700 and 500 rpm.
Thread Starter
Instructor
Joined: Sep 2018
Posts: 165
Likes: 64
From: Lakeville MN
Interesting, I didn't know that.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
You might have some issues with vacuum leaks or ignition timing, also. Verify those issues are not involved before you go spending money on a "fix". Or, just increase curb idle speed a bit to keep the engine running when A/C is turned on.
Melting Slicks
Joined: Apr 2001
Posts: 3,399
Likes: 278
From: Olmsted Falls, Ohio
What did GM recommend for the idle speed originally?
800 sounds low for a 4-speed without the idle solenoid.
Mine called for 900 at idle with the A/C off. Sorry I can't remember what it dropped down to when A/C was on,
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Le Mans Master
Joined: Nov 2003
Posts: 5,772
Likes: 694
From: Maryland
St. Jude Donor '05, '09, '15
Get one of these and make your own bracket.
https://www.summitracing.com/parts/smp-es9
Or check your local junk yard. I bought one for $25 with a bracket I modified to fit.
Tom
https://www.summitracing.com/parts/smp-es9
Or check your local junk yard. I bought one for $25 with a bracket I modified to fit.
Tom
Racer
Joined: Oct 2001
Posts: 474
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From: Portage La Prairie Manitoba
