Car Dies While Stopping Too Fast

C

CatMan1

Senior Member
I know I've had this problem before and fixed it, but can't remember how. It seems like it was a simple carb adjustment. Anyone know?
 
These may help.
 

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  • Carburetor - Driving With The GAV 237kb.jpg
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This was a known problem with the earlier Zenith carbs. The introduction of the of the carb with the brass secondary well went some way to resolving it, but as Gary#2 and Bob#3 say...incorrect fuel level is the usual culprit.
 
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I love this graphic. I can never remember slide three when I need to; going up hills. Printed it and now it's in my door pouch. Thanks!
 
I was just noticing the 3 degrees. Guess there are other benefits to changing that tired old front spring after all. I know when I changed mine it was amazing to see the height change, and the handling improvement.
 
I just fixed this on my cabriolet - in my case it was rust accumulation inside the carburetor. Not saying that is your issue however.
 
I agree with Bcontheroad--this is a great graphic. I find all of Bob Bidonde's graphics exceptionally well-done and helpful. Bob--do you sell a book of them?
 
My graphics are not for monetary profit. I make them primarily to show at club meetings as I am the Tech VP of the Model A Ford Club of Long Island. I also share them on Model "A' websites when I think they will be helpful to a fellow Model A'er.
 
IMHO, the first, non invasive thing to do is to reset your base idle air mixture. Use the instructions in the Model A Instruction Manual. I set my GAV at 1/4 turn open to do this. Our car performs as described in Bob's third graphic panel shown above.
 
I’ve always tried to address this issue by adjusting the float level, but I just bought a Z-carb rebuilt by a reputable carb craftsman, and it had the same trouble of dying at stops. I was about to open the carb and adjust the shim washers and re-measure the float level and so on, when it occurred to me the GAV had initially been sticky. I replaced that with one from my bone pile, and it was after that that the carb started to die at stops.The builder sent me a replacement GAV needle and after I installed that today there was no more dying. Then I remembered years ago an oldtimer ‘A’ guy said "it’s not always the float valve; sometimes if you open the GAV the dying will stop." In my case, a new needle did the trick. Lesson learned.The oldtimer was right.
 
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