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Joined: Jul 2004
Posts: 118
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jul 2004
Posts: 118 |
Hello...my 1965 283 two barrel won't idle! If I step on the gas, it runs and sounds smooth at higher RPMs, but letting off the gas, it will drop RPMs until it dies. I tried adjusting the idle speed on the linkage, but that didn't seem to be it. There are two carb adjusting screws on the front of the carb...I thought one might be an idle adjustment screw (gas-air ratio), but not sure which. Any help is always appreciated.
Best wishes,
Chuck
garbo
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Willwood Engineering
Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188
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Joined: Sep 2006
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Oil Can Mechanic
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Oil Can Mechanic
Joined: Sep 2006
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did this condition arise suddenly or over a period of time? both screws are mixture screws. should be a spring around each one.
Chevrolet
Valve In Head, Ahead In Value
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Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
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Both screws on the front are air/fuel adjustment screws. They are for each barrel on the carb. Set the idle speed so it will keep running. Adjust the two front screws for smooth operation. Then lower the idle speed with the idle screw. Readjust the front screws. Use of a vacuum gage will help immensely for this project. 
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Jul 2004
Posts: 118
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jul 2004
Posts: 118 |
Thanks Dads 31 and AntiqueMechanic...my 1965 had been sitting in my mother's garage for 13 years without being run. Believe or not, the Sear's DieHard still holds a charge and has operated like a new battery even thou it sat uncharged all that time. I had the body work done and the whole car repainted and, supposedly had the gas tank drained and the carb rebuilt, but it doesn't look like it. The car seemed to idle okay, but if I revved it up, the rpms would drop to a stall. I thought it might be flooding itself. The exhaust was black so, with your help, I adjusted the gas/air mixture. The idle speed seemed to increase. Now for a test run. Thanks again and I'll let you know the results.
Best wishes,
Chuck
garbo
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Joined: Jul 2004
Posts: 118
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jul 2004
Posts: 118 |
I'm very happy to report that my '65 now "runs like a champ". I just needed to lean it out some. Thanks again for your input.
Best wishes,
Chuck
garbo
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Joined: Sep 2006
Posts: 731
Oil Can Mechanic
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Oil Can Mechanic
Joined: Sep 2006
Posts: 731 |
crusin' the Rockies in an old Chevy..... doesn't get any better than that.
Chevrolet
Valve In Head, Ahead In Value
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Joined: Sep 2003
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ChatMaster - 4,000
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ChatMaster - 4,000
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Hey Garbo, This must be the 65 Impala that "we" were talking about a while back. Around May or June. As I recall, it was your mother's. I don't remember if it was a 2 door hardtop or a 4 door hardtop?????? Sounds like you're enjoying it. I'm glad you kept it and got it running.  Bill.
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Joined: Jul 2004
Posts: 118
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Jul 2004
Posts: 118 |
Hi Bill...you're right. It's the two door, I call them hardtop convertibles, Impala 283 auto. I had the body work done and had it painted a stock red (from the aqua green)...a little off red that looks real jazzy. If my mother saw it now (she's 92), she have a tizzy. I need to replace some of the chrome pieces, but everything else looks good. I was intending to sell it, but now I don't know...In the meantime, it's safely stored in the garage. I'm still working on my '39 MD...Since I've retired, I don't have as much time as I used to (like someone said...I should go back to work so I can have two days off)
Best wishes and thanks for the thoughts,
Chuck
garbo
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Joined: Jul 2006
Posts: 388
Backyard Mechanic
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Backyard Mechanic
Joined: Jul 2006
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I'd strongly suggest rebuilding your carburetor.External settings do not go out of adjustment by themselves.
I suspect by what you described that your float/needle and seat assemblies are very gummed up or bad.
Leaning out your idle mixture screws simply compensated for what is most likely an internal carb problem.Nothing a simple rebuild will not take care of. My thoughts,Jim
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Joined: Jul 2004
Posts: 118
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jul 2004
Posts: 118 |
Thanks Jim...good suggestion.
Chuck
garbo
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Joined: Dec 2005
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ChatMaster - 1,000
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ChatMaster - 1,000
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What is the float made of in this carb.?
I have had some metal floats get holes in them in the past.
People are like a box of chocolates you never know what you are going to get...
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Joined: Sep 2003
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ChatMaster - 4,000
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ChatMaster - 4,000
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Chuck,
Good to hear you're enjoying the car. 65's are very nice looking. Especially 2 dr hardtops.
Take care......
Bill.
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