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Veteran
Posts: 249
 
Location: Spencerport, New York | My 57 318 with the dual carbs has a severe stumble on acceleration from a stop and making a left turn or sometimes slowing down to make a left. My carbs were professionaly restored a few years ago and are in good condition.
Seems to me this is a problem that goes way back, but I can't remember what the solution was. Can anyone help out? Dick |
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Expert
Posts: 3408
 
Location: Chestertown, NY ( near Lake George) | Metering rods adjusted wrong, low float levels, dirt in the carbs, weak accel pump action, are a few of the possibilities. |
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Expert
Posts: 2679
| fintastic57 - 2010-04-07 7:24 PM
My 57 318 with the dual carbs has a severe stumble on acceleration from a stop and making a left turn or sometimes slowing down to make a left. My carbs were professionaly restored a few years ago and are in good condition.
Seems to me this is a problem that goes way back, but I can't remember what the solution was. Can anyone help out? Dick
Try adjusting them with a vacuum gauge, the rich/lean screws.... also check the choke and a new gas filter would help. |
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Expert ,, George Passed away July 28th 2021, He will be Missed
Posts: 1295
Location: Twin Falls, Idaho | They are running way too rich. There is a tech service bulletin issued in 1957 on the CHrysler 300C with dual fours pertaining to this exact problem. If you would like a copy, please send me your email and I can email it to you. You can then take it to a qualified Carter WCFB tech to perform the mods to your carbs. I did it on my 300C and what a difference and better mileage.
George
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Expert
Posts: 1302
Location: Skaneateles,NY(summer)/Port St.Lucie,FL(winter) | I had the exact problem with the 2x4's on my Adventurer engine. Floats were set a bit too high... |
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Expert
Posts: 3575
Location: Netherlands | Float level problem.
If the engine hesitates then my guess is one or more of them is adjusted too low, leaving little fuel in the carb(-side).
On stumbling, black smoke will probably exit the exhaust aswell, then the float(s) is probably too high.
Edited by BigBlockMopar 2010-04-08 8:57 AM
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Elite Veteran
Posts: 916
Location: Pau, S-W France | I've the same problem on my '57 Imperial. As says chrysler300 ther's a technical bulletin which shows what to do (i have this bulletin !) but i never did it as it needs to drill in the carb .... |
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Veteran
Posts: 249
Location: Spencerport, New York | Thanks to all who responded. I will follow up when I get it straightened out. Dick |
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Board Moderator & Exner Expert 10K+
Location: .Norfolk..Mafia.. ,England UK | POSTED ON BEHALF OF NEIL D500
Well, here's the Official Party Line, from Carter.
I've had this be done to Horrie's carb, and about 85%
of the up-hill/left-hand carb bowl wash-outs
have been eliminated via this protocol.
 (289.jpg)
 (290.jpg)
Attachments
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 289.jpg (54KB - 132 downloads)
290.jpg (103KB - 147 downloads)
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Extreme Veteran
Posts: 394
Location: Royal Oak, MI | When the AFB came out in 1958, it was billed as an improved design and "non-leaking"... I remember reading this in a Motor Trend review of the '58 Fury. So this was a known quirk with the WCFB almost from its inception...
Edited by Boris56 2010-05-21 4:32 PM
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Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!
Posts: 19146
Location: bishop, ca | The WCFB was commonly acknowledged as having this (up-hill-)left-turn float-bowl wash out problem.
The problem is mentioned in several MT road tests that I can recall, right now.
It is a major pisser problem...
The AFB's have their float bowls installed at a 90-degrees different orientation (forget which-way, right now)...but the effect was to eliminate that momentary fuel starvation situation from occurring, during a concerted left-hand cornering situation.
You KNOW it, when it happens...always on left-hand turns.
Edited by d500neil 2010-05-21 7:35 PM
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Elite Veteran
Posts: 916
Location: Pau, S-W France | What is this "bushing" made of ? I know bushing on control arms or leaf springs but i think this bushing is not rubber made ....
What is the inside diameter ? |
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Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!
Posts: 19146
Location: bishop, ca | It can be simple thin brass stock tubing.
It's supposed to act as an section-insulating-bushing, while maintaining a vacuum passage.
I'd love to see a real photo of its installation, but I've never been present when this bushing's
been installed--this procedure has been done at least twice, on different carbs, since I've owned
my car.
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WCFB- LEFT TURN HESITATION_STUMBLING
