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grewp
Samba Member
Joined: July 31, 2007
Posts: 24
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 Posted: Mon Aug 19, 2019 4:56 pm Post subject: 69 doesn't like to accelerate |
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My 69 beetle starts fine, idles fine but when I accelerate, even a tiny bit, it coughs and gasps. It has been running well until now. I filled the tank the day before.
Any ideas are greatly appreciated.
Pat
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glutamodo 
The Android
Joined: July 13, 2004
Posts: 26620
Location: Douglas, WY
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| Posted: Mon Aug 19, 2019 5:09 pm Post subject: Re: 69 doesn't like to accelerate |
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Sounds like the carburetor's "accelerator pump" is not functioning properly. This is a nozzle that should start to shoot extra fuel down the carburetor whenever you open the throttle.
Also sounds like a carburetor/distributor mismatch.
Add the two together and you get 
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Andy T.
"What is Glutamodo, Horror of Toyko, besides total, fiendish, quality-a-you brain!" |
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grewp
Samba Member
Joined: July 31, 2007
Posts: 24
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| Posted: Mon Aug 19, 2019 5:16 pm Post subject: Re: 69 doesn't like to accelerate |
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Thank you. I will look into the pump. Any advice on how to test this?
Pat
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andk5591
Samba Member
Joined: August 29, 2005
Posts: 16807
Location: State College, PA
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| Posted: Mon Aug 19, 2019 5:46 pm Post subject: Re: 69 doesn't like to accelerate |
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Yeah - take the air cleaner off. You will see a nozzle or two toward the top of the carb. When you work the throttle, you should see a stream of gas coming out shooting down the throat of the carb. Should be a nice spray.
But you said it was fine until now, correct?
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D-Dubya Manx clone 1914. Ex wifes car.
Rosie 65 bug - My mostly stock daily driver.
Woodie 69 VW woodie (Hot VWs 7/12).
"John's car" 64 VW woodie - The first ever
Maxine 61 Cal-look bug - Ex-wifes car.
66 bug project - Real patina & Suby conversion
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sb001
Samba Member
Joined: May 19, 2011
Posts: 10472
Location: NW Arkansas
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| Posted: Mon Aug 19, 2019 5:53 pm Post subject: Re: 69 doesn't like to accelerate |
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| grewp wrote: |
| I filled the tank the day before. |
This is absolutely the only thing you did before it started acclerating poorly? You did not touch or replace anything at all?
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I'm the humblest guy on this board.
1969 autostick sedan, family owned since new
1600 SP engine
Solex 30 PICT 3 carburetor
Bosch 113905205AE autostick distributor |
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glutamodo
The Android
Joined: July 13, 2004
Posts: 26620
Location: Douglas, WY
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| Posted: Mon Aug 19, 2019 5:55 pm Post subject: Re: 69 doesn't like to accelerate |
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| sb001 wrote: |
| grewp wrote: |
| I filled the tank the day before. |
This is absolutely the only thing you did before it started acclerating poorly? You did not touch or replace anything at all? |
Yeah, I think I see where this line of inquiry is going as I've twice over the years been affected by contaminated fuel - both times I strongly suspect diesel got mixed in with gasoline
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grewp
Samba Member
Joined: July 31, 2007
Posts: 24
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| Posted: Sat Oct 05, 2019 10:02 am Post subject: Re: 69 doesn't like to accelerate |
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| andk5591 wrote: |
Yeah - take the air cleaner off. You will see a nozzle or two toward the top of the carb. When you work the throttle, you should see a stream of gas coming out shooting down the throat of the carb. Should be a nice spray.
But you said it was fine until now, correct? |
Sorry for being so late in responding ... yes, I have done no repairs at all. Been driving it all summer. Just jumped in the one day and as I was driving it began acting up. Idled it in first gear all the way home.
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VW_Jimbo
Samba Member
Joined: May 22, 2016
Posts: 11428
Location: Huntington Beach, CA
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| Posted: Sat Oct 05, 2019 10:10 am Post subject: Re: 69 doesn't like to accelerate |
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| glutamodo wrote: |
| Sounds like the carburetor's "accelerator pump" is not functioning properly. This is a nozzle that should start to shoot extra fuel down the carburetor whenever you open the throttle. |
Super easy to check!
Plugged up acceleration circuits are very common. Probably the most common complaint with carburetored cars.
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