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#1 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,334
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Stalling with AC in a 1970 402
I don't like to keep my idle too high (about 500 in drive), but sometimes that's not enough to keep the engine from stalling if I have the AC on high and do a tight turn, for example... the accessory load will stall the engine sometimes.
There's no "idle kicker" or solenoid on the 1970, so I'm wondering: a) Does anyone else experience this? b) Can a later model solenoid be retrofitted easily? Thanks, Dave
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#2 |
Moderator
![]() Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,210
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Re: Stalling with AC in a 1970 402
Anything can be made to work...
What carb and manifold ? The "kicker" solenoid just bolts to a carb stud and nut, plus a lock pin,,,wired in relayed parallel circuit energized when A/C is turned on.... In my mind, 500 is a bit low...maybe try 650 hot and see how it goes... Have fun... ![]() ![]() ![]() ![]() ![]() ![]() |
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#3 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,931
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Re: Stalling with AC in a 1970 402
How hard are you turning the steering wheel? If you are "two-blocking" - hitting the stops hard when turning- that can pull enough energy from the engine to stall it. Further, you should never "two-block" the steering at all, as this drives pump pressures high enough to burst the high pressure hose (with a potentially catastrophic fire). Ask me how I know. Fortunately, it was just a '61 Studebaker Lark VIII convertible. I wouldn't mind having that critter now, if only for the resale value.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#4 |
Registered User
Join Date: Jun 2015
Location: Melbourne, Australia
Posts: 231
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Re: Stalling with AC in a 1970 402
I run my 396 at 600rpm in gear and have no problems with stalling with the a/c
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John 69 c20, 396, th400, dana60, ps, ac |
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#5 |
Proprietor of Dale's Corner
![]() Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,353
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Re: Stalling with AC in a 1970 402
I think 500 is too low of rpm, try 650. I'm sure it wouldn't be too hard to retro a idle solenoid on there though.
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man R.I.P. FleetsidePaul |
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#6 |
Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: Stalling with AC in a 1970 402
What's your idle speed in neutral with the A/C off?
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