So I was having issues with idling so I traced back any vacuum leaks and everything was good, figured out I needed to adjust the idle screw. Car idles great now. Only issue is that I gotta just beat on the gas pedal over and over to get it to start. Then when it's running I push on the pedal quickly even when the car is warmed up it sputters and will stall. This happens when I take off too, unless I give it a solid amount of throttle then ease off the clutch. If I slowly work up the RPM its fine but if I do it too quickly it sputters. I did a ton of research about this and everything seems to lead back to the accelerator pump. I have mechanical secondaries and when I push on the gas pedal when the car is off I can see the secondaries open and a bunch of gas and vapor dump in.

 

clogged fuel filter?

sterling also has a writeup on how to adjust the accelerator pump

 

I would say a carb rebuild is in order. Pull that baby off and separate the top from the rest of it, get a good look and clean the float bowls/jets/emulsion tubes/ect. Your problem sounds very similar to a local carb i just overhauled, it had clogged main jets and the screens under the banjo bolts were almost solid.

Isaac

 

Sounds like rebuild and a good adjustment are what you need. Your primary issue might be just the accelerator pump, but I had similar problems when I had that solenoid where the fuel lines come in disconnected. The car was a HUGE handful to keep running without that plugged in and really acted like the accelerator pump linkage was out of wack.

 

yup definitely the accelerator pump, it could just need adjustment, or be leaking and need the screws tightened, or at the worst have to be replaced with a rebuild

initially have a look down the barrels, with the engine off, and pump the throttle by hand slowly. You are looking for the fuel stream coming out of the two nozzles, in between the two smaller primary barrels. its in the centre of the pic below. You may need a torch as it can be hard to see.



What you want to see is fuel coming out as soon as you move the throttle. The problem might be that it is not shooting fuel early enough. If this is the case, the adjustment nut needs to be backed out a few turns - it is on the right of pic, connected to the throttle shaft via a rod and lever



basically back it out little by little until fuel comes out of those nozzles as soon as you press the throttle.

pretty sure that's your problem, might be worth checking for leaks as well. when pressing the throttle by hand, feel around the AP cover for leaks. (right of the pic above, has 4 screws holding it onto the carby body). If lucky you may just need to tighten the screws, failing that it's rebuild time.

good luck

 

By torch, he means flash light

 

Before digging into the carb, I would check a couple of other possibilities:

1. Verify spark on all of the plugs.
2. Check the timing.
3. Reset the idle speed and mixture using Sterling's writeup: http://sterlingmetalworks.com/tuning_the_nikki.htm









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