I start my baby once or more a week. I have to add a few drops of gas down the carb to get her going. Once shes going shes ok. No problm after that. I do the add gas to the carb thing because when I try to start it only gets as high as 2500 rpms for about a quick jolt and then I here the engine sucking in lots of air and no spark. This problem has been plagueing me for some time. I have checked all the ground wires and stuff. I have a recently rebuilt carb, unless thats the problem?? humm.. Could it be that accellerator pump adjustment? Or maybe the idle circuit is cloged?

I have a correctly wired MSD box, new spark plugs and new custom cut wires.

 

Checking the accelerator for squirt/volume is easy. If it idles fine once warmed up, it's more likely the choke and fast idle that's the problem. Have you modded the carb or done the rats nest removal?

 

its not likely that its an ignition drop off. its more likely cold start adjustment on the carb. the stock carb uses a thermo controlled choke that gradually decreases the idle as the engine warms or in some cases, just drops the idle once the engine is warm in one shot. its common for the rotary to not want to idle when cold. you can help it along by making sure you have a fresh fuel filter, plugs, wires, cap, rotor, and clean air filter. just to make sure, check your vaccume lines to ensure you have no vaccume leaks.

 

If I'm understanding your situations correctly, then it sounds like your carb is running out of gas shortly after starting. Do you have a fuel leak? Maybe the fuel line is emptying out, then the pump has to refill the line before the carb gets more gas to refill the bowls? Or maybe the fuel pump isn't getting gas from the tank right away, like maybe a air leak in the line that leads to it.. I don't know, just thought I'd throw that out there. But either way it does not sound like an ignition issue. Good luck.

 

humm.. I did mod the carb. I took off all the choke stuff. I have no vacumm lines except to the dizzy and the crank case vent. Both of which should have nothing to do with the problem. Maybe the acc pump is not working correctly and its just not filling the carb with gas?

humm I am going to adjust acc pump again and see where that leads me. I am also going to check on the pump and lines. Fortunately there are no leaks on my baby, what so ever.

 

As long as you can see gas going into the car when the linkage is moved, then you might try giving the pedal a few more pumps before starting. On mine (no choke) on cold days I'll give her anywhere from 5 - 8 pumps before turning the key. Then once it catches, I'll have to keep the revs up around 2k or so for a while until she warms up.

 

Thats part of the problem with taking all the choke stuff off, it won't like cold starts. Does your idle raise at all when you pull out the choke ****? The accelerator pump is to help start and and transition the carb. Once pumped, that shot of fuel is quickly comsumed.

 

ok, I adjusted the acc pump some more. the problem is still there. Now it does it whether the engine is hot or cold.

Idels fine. Hit gas pedal.. no responce engine sucks lots of air.. like it bogs(flood indication?)
enough to hear it inside the car with music on. I wonder if my mixture could be off. I am going to zero out the carb needles and idle. Then give the idle screw a few turns and then work on the mixture needle. I wonder if its just some stupid adjustement.


Car has 77000 miles.

 

ok heres the latest..

car is warm. idles great.
car is ice cold - I give it a few pumps and it starts fine.. ruff idle untill car is warm under standable since I a modded carb

Car is either warm or cold - stop on gas and it SOMETIMES inhales lots and car starts to die out.