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Low speed problem, at wits end
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KENO View Drop Down
Grand Poobah
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Points: 11112 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Topic: Low speed problem, at wits end
    Posted: August-22-2021 at 7:06pm
For Terriefying

If it won't idle very good and smells like it's flooding, have you looked down the carburetor throats while it idling, to see if gas is spilling down either the primaries or secondaries.

You really shouldn't see anything because at idle it's all going in below the throttle plates.

If you see nothing and still think it's too rich, take a look at the thread in the link below for some things to look at/consider for a too rich idle
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63 Skier View Drop Down
Grand Poobah
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Points: 4269 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 63 Skier Quote  Post ReplyReply Direct Link To This Post Posted: August-22-2021 at 12:25am
Originally posted by SNobsessed SNobsessed wrote:

Also consider that other ignition parts could be worn, like plugs, plug wires, & coil.


I agree.  As much as it seems to be a fuel problem, and maybe it is, having weak ignition (weak spark) can keep it from idling when you add load by putting it in gear.
'63 American Skier - '98 Sport Nautique
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SNobsessed View Drop Down
Grand Poobah
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Points: 7102 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SNobsessed Quote  Post ReplyReply Direct Link To This Post Posted: August-21-2021 at 8:57pm
Also consider that other ignition parts could be worn, like plugs, plug wires, & coil.
“Beer is proof that God loves us and wants us to be happy.”

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Jonny Quest View Drop Down
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Points: 2979 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jonny Quest Quote  Post ReplyReply Direct Link To This Post Posted: August-21-2021 at 6:01pm
My recommendations:

1.  Rebuild carb
1(a)  Double-check float levels
2. Wedge Plate
3. New gaskets between intake and wedge plate and between wedge plate and carb
4. Check for vacuum leaks
5. Set ignition timing to PCM spec
6. Verify that distributor is properly working -- including timing advance mechanism
7. Go boating
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PConaway View Drop Down
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PConaway Quote  Post ReplyReply Direct Link To This Post Posted: August-21-2021 at 4:29pm
I have the same problem on 78 Southwind. 351 Windsor with rebuilt Holley carb. Carb has been on engine about 4 years. Has a wedge plate to help level out bowls. Waiting for end of season to rebuild.
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MrMcD View Drop Down
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Points: 3750 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MrMcD Quote  Post ReplyReply Direct Link To This Post Posted: August-21-2021 at 4:20pm
Did you drain the old gasoline and replace with new fresh gas?
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Terriefying View Drop Down
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Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Terriefying Quote  Post ReplyReply Direct Link To This Post Posted: August-21-2021 at 12:50pm
79 Ski Tique
302 Ford Commander
Holley carb

Sat for years because it was unreliable.
Got it out and rebuilt the carb over the winter, tuned up and added electronic ignition.
Never idled great and would die at slow speed.
Worked with the idle mixture screws, seemed to help for a minute.
Eventually got to the point where it would not idle or run at all. Took it to a mechanic who checked fuel lines etc and said it idled when he lowered the front if the trailer to level the engine so he adjusted the float bowls (older carb so you have to do it manually).
It idles now but as soon as you put it in gear it will stall. You have to feather the throttle continuously to run at low speed and it will still die every few minutes. Smells like it's flooding.
Unfortunately, our place is on a channel so it is a long, frustrating ride through a no wake zone.
Messed with it pretty much the entire summer, it's just sucked good money after bad.
Any ideas?
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