ACCEL PUMP???

[hep2jive]

1951 Plymouth

 

After warming my car up and shutting it off I looked down the carb and  gave it some gas I saw there was a little more than a dribble coming from the accelerator pump. Should the stream of gas from the accelerator pump be stronger than this little more than dribble? Car runs very nicely but sometimes I think I could have a little bit more power. Maybe I should stretch the accelerator pump spring out? I saw a video where Keith said he did that and it helped get a stronger stream of gas into the carburetor.

Thoughts? Thank you!

[vintage6t]

Looks pretty good to me. As long as you don't have a stumble when accelerating, it's probably fine. 

 

If you think it does need improvement before stretch the spring.

1. Take the carb apart and clean out the pump circuit to make sure there's no small debris clogging the output nozzle. 

2. You can adjust the stream. There's a lever on the bottom of the carb that connects to the accel pump. There's three holes in the lever. Changing the hole where the linkage is connected changes how much the accel pump is depressed. The holes are account for seasonal changes. If I remember correctly the outer most hole will provide the strongest stream.

[hep2jive]

@vintage6t

Thank you! I'll try cleaning then see how that works. Then adjusting. Should I look down the carburetor when the car is running to see if the squirts better?

[plymouthcranbrook]

You don’t have to have the car running to check. With it off just open the throttle quickly while looking down the carb. You should see a good short stream of fuel each time you do that until the bowl is empty. What has been suggested is good and if it runs well you might be over thinking the issue. The main purpose of the accelerator pump is to stop flat spots when the throttle is opened. Short term problem, short term cure.

[hep2jive]

Thank you I'll update here later. I appreciate your guys help 🙏🏻 

[Los_Control]

My thoughts ... my professionally rebuilt carb shoots out a nice sharp stream .... yours seems to dribble.

But while it is dribbling, it is probably passing just as much fuel as mine does in a small diameter concentrated stream .... yours is larger diameter with less pressure.

Either way they both do the job to apply more fuel when opening the throttle.

 

Unless you have a problem, I think it might be fine.

[Sam Buchanan]

15 hours ago, hep2jive said:

1951 Plymouth

 

 

<snip>Car runs very nicely<snip>

 

 

 

 

Don't touch it, the car sounds happy. 

[soth122003]

If you haven't pulled that lead plug on the side of the carb and removed that jet in the circuit, it is possible there is some crud in there that is causing the dribble. When I checked my pump for function, the stream shot across the throat and thru the middle support and helped atomize the fuel better. But like others have said if it still works, i wouldn't worry about it. Just make a note the next time the carb is out to be cleaned to check and clean that particular jet.

 

Joe Lee

[hep2jive]

5 hours ago, Los_Control said:

My thoughts ... my professionally rebuilt carb shoots out a nice sharp stream .... yours seems to dribble.

But while it is dribbling, it is probably passing just as much fuel as mine does in a small diameter concentrated stream .... yours is larger diameter with less pressure.

Either way they both do the job to apply more fuel when opening the throttle.

 

Unless you have a problem, I think it might be fine.

Thanks when I quickly gave it gas looking down the carb it seems to have a stronger jet of fuel. I think I'm good too. Lol I love Los Control. Good name lol

[hep2jive]

2 hours ago, soth122003 said:

If you haven't pulled that lead plug on the side of the carb and removed that jet in the circuit, it is possible there is some crud in there that is causing the dribble. When I checked my pump for function, the stream shot across the throat and thru the middle support and helped atomize the fuel better. But like others have said if it still works, i wouldn't worry about it. Just make a note the next time the carb is out to be cleaned to check and clean that particular jet.

 

Joe Lee

Thank you! I cleaned it up a bit...it wasn't dirty but still sprayed it. Car runs great so I'll leave it for now.  Thanks for your input.