Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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Joined: Feb 2020
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Grease Monkey
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Grease Monkey
Joined: Feb 2020
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I just picked up a '46 pickup. It idles well but stalls out when I give it gas. I am a bit new at this stuff but determined to figuring it out. Anyone have any recommendations on trouble shooting this one?

Filling Station - Chevrolet & GMC Reproduction Parts


Filling Station


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ChatMaster - 1,000
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ChatMaster - 1,000
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Hi Automation101

The most likely answer is that your carburetor accelerator pump isn't working.

If you very slowly open the throttle with no load does it still die?

Last edited by Stovblt; 08/03/22 08:44 PM.

Ole S Olson
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Grease Monkey
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Grease Monkey
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If i open it slowly it will not die but give it gas quickly the engine cuts out.

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ChatMaster - 1,000
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Yup

Sounds like your accelerator pump/system isn't working.

With the engine NOT running, remove the air cleaner, make sure the choke is open, look down through the carburetor, and open the throttle quickly.
You should see a good squirt of gas shoot into the carburetor.
If not, you've found the problem.

Good luck!


Ole S Olson
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Backyard Mechanic
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Backyard Mechanic
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A working accelerator pump is not a requirement to drive, but it certainly helps driveability! wink

Disconnecting the accelerator pump to save fuel was a COMMON modification in north central Missouri during WWII.


Good carburetion is fuelish hot air

Owner, The Carburetor Shop (in Missouri)
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Backyard Mechanic
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Backyard Mechanic
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Automation 10,
It could be a clogged gas pump filter. My 35 used to do the same thing. I could drive it a little then it would stall out. It would start right up again and idle fine but when I went to drive it, it died. If I let is sit for an hour or so it was able to drive again until the crud in the filter got stirred up and clogged the line. I have the pump with the glass bowl filter on it. I took it all apart and cleaned the screen and also took the top off the pomp and cleaned in there. Put it all back together and no problems. It could also be the carb but give the filter a check too.

Pete V

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Shade Tree Mechanic
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Shade Tree Mechanic
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OR, it could be what happened to me in Alaska. I saw an ad for a 59 Rambler station wagon with the exact same problem. The engine had been rebuilt but never rev'ed up. Went and looked. Started really easy, but if you touched the gas it quit, like someone was turning the ignition off. I thought about it and for $50 I bought it. Asked the lady if I could work on it for an hour or so in her driveway. She said OK, but if I fixed it she wanted to know how. The secret was the lifters never rattled. In 1959 Rambler 6 bangers had mechanical lifters. I pulled the rocker cover, loosened up all 12 valves, started it and reved it up. Ran like a top. Best I can figure the instructor at the High School auto shop thought it had hydraulic lifters. I drove the car for 3 years and sold it for $300. Just broke in the rings at 3 years use. I'd buy another Rambler in a minute. The 232 with a 2 bbl carb was bullet proof, and the push button tranny was a kick. Good luck.


Rusty Junk

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