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| | | | Joined: Sep 2010 Posts: 17 New Guy | | New Guy Joined: Sep 2010 Posts: 17 | 53 3100 with a rebuilt 235. Manual choke, electronic ignition, Rochester 1 bbl carb. When starting cold it idles and runs like new. I can drive it about 10 miles and it will not idle. Just like you turned the key off at an intersection. It will instantly start up and run after that, but will not idle. I can let it cool down @ 10 minutes and it will idle fine. Any ideas? Thanks | | | | | Joined: Jun 2016 Posts: 236 DLBrooks | | DLBrooks Joined: Jun 2016 Posts: 236 | I take when it is cold you have the choke on or partially on. When choke is released--pushed in --- does it die? I would start with idle screw until it will idle --- and idle mixture screw may need adjustment. Start with idles mixture screw 1 1/2 turns out then adjust idle screw until it idles. Idle speed somewhere around 600. | | | | | Joined: May 2005 Posts: 1,624 Shop Shark | | Shop Shark Joined: May 2005 Posts: 1,624 | BTW....that's clockwise from 2-12 turns out. I do a 1/4 turn till it starts to bog down then counter clockwise.
I also would look for a vacuum leak if you have no luck with the idle air. At idle a vacuum leak is much more noticeable.
Last edited by beltfed; 11/23/2016 12:32 AM.
Six volt guy living in a twelve volt world
| | | | | Joined: Aug 2004 Posts: 1,418 ODSS Lawman | | ODSS Lawman Joined: Aug 2004 Posts: 1,418 | Hang on
Before you adjust yourself out of running, lets start with the basics.
First anytime an engine will not idle, vacuum leaks are first suspect. What have you done to find any? What approx. RPM is your idle set?
With cooler weather, it takes more time for these engines to run at idle correctly.
SWEET Sergeant At Arms: Old Dominion Stovebolt Society BUNS?!?!?!Where we're going, we don't need no buns.....1950 GMC 450 1951 Chevy 1/2-TonThe GreenMachineIn the Stovebolt Gallery | | | | | Joined: Sep 2010 Posts: 17 New Guy | | New Guy Joined: Sep 2010 Posts: 17 | It will idle with the choke pushed in. It will idle well until I drive it @ 10 miles or so. I have not looked for vacuum leaks yet. With the electronic ignition, I don't think I have a vacuum advance, but I will look for vacuum leaks. I think idle rpm is 600-750. It idles great in the driveway, but after a short drive it won't. Thanks for the responses and I will check for vacuum leaks. | | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | After running for 10 minutes will it idle with the choke partially out?
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
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| | | | | Joined: Sep 2010 Posts: 17 New Guy | | New Guy Joined: Sep 2010 Posts: 17 | I have not tried that. I will try and let you know. | | |
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