need to prime carb to start

[36 Ply]

If your needle valve has a rubber (neoprene) tip, today's fuels could cause it to swell, causing problems.

I changed my neoprene tipped needle valve to an all steel one on my '36.

Regards,

Pat O'Connor

[elmo]

if you have gas coming from the pipe just before the carb , your problem has to be in the carb or just before it which comes back to the needle valve . which is located in the inlet fitting on the carb that the fuel pipe fits onto

[thepassionofcrust]

Is your accelerator pump working properly?  Pull your air filter and look down the carb.  When you work the accelerator linkage, you should be able to see a steady stream of gas squirting into the carb.  If you have gas to the carb and the pump isn't working you get nothing but the gas through the main jet.  Probably not enough go juice to get going on a cold engine.

If you are not gitting a visible squirt, it probably time to put a carb kit in it.  You might be able to get a bit mor life out of it by removing the pump and soaking it in trans fluid or Marvel Mystery oil or just regular motor oil.  It will soften up the leather cup of the pump.

Now I am leaning in this direction. i guess I will go check that now.

[thepassionofcrust]

Well I just picked up a new fuel pump....crossing my fingers... ;D

Nope still doing the same thing.

It has gas right before the carberator...could there be something blocking the fuel as it enters the carb?? But not blocking it enough to stop it from running once primed and started??

[thepassionofcrust]

Well I just picked up a new fuel pump....crossing my fingers... ;D

[thepassionofcrust]

Is your accelerator pump working properly?  Pull your air filter and look down the carb.  When you work the accelerator linkage, you should be able to see a steady stream of gas squirting into the carb.  If you have gas to the carb and the pump isn't working you get nothing but the gas through the main jet.  Probably not enough go juice to get going on a cold engine.

If you are not gitting a visible squirt, it probably time to put a carb kit in it.  You might be able to get a bit mor life out of it by removing the pump and soaking it in trans fluid or Marvel Mystery oil or just regular motor oil.  It will soften up the leather cup of the pump.

thanks for your insightfull post...well I know that there will be no vidible flow of gas in the carb if it isn't even coming out of the filter...therefore not even making it to the carb. once I take the line off the carb the pump gets a lot quieter and the flow comes. then I put it back on real quik and she fires right up...

[thepassionofcrust]

You might have a clog in the line between the pump and the tank.  Disconnect the line on the tank of the pump and put some low pressure compressed air through the line.  This will clear any debris.  Also when you do this remove the gas cap and make sure you are able to hear bubbles comeing from te tank.  Next make sure there are no air leaks between the tank and the pump.  If there are air leaks the pump will pull air easier than fuel.

thanks....why would it be intermitten if there is a clog?

[thepassionofcrust]

Check the needle valve it sounds like it is sticking

what's a needle valve?

[elmo]

Check the needle valve it sounds like it is sticking

[plym_46]

You might have a clog in the line between the pump and the tank.  Disconnect the line on the tank of the pump and put some low pressure compressed air through the line.  This will clear any debris.  Also when you do this remove the gas cap and make sure you are able to hear bubbles comeing from te tank.  Next make sure there are no air leaks between the tank and the pump.  If there are air leaks the pump will pull air easier than fuel.

[plym_46]

Is your accelerator pump working properly?  Pull your air filter and look down the carb.  When you work the accelerator linkage, you should be able to see a steady stream of gas squirting into the carb.  If you have gas to the carb and the pump isn't working you get nothing but the gas through the main jet.  Probably not enough go juice to get going on a cold engine.

If you are not gitting a visible squirt, it probably time to put a carb kit in it.  You might be able to get a bit mor life out of it by removing the pump and soaking it in trans fluid or Marvel Mystery oil or just regular motor oil.  It will soften up the leather cup of the pump.

[thepassionofcrust]

ok...after tinkerin around a bit I noticed that fuel does not always flow through the filter. at these time the pump (aftermarket electric) get a lot louder. if I take the line off after the filter  before the carb all of a sudden after a few seconds here comes the gas and the pump gets quiteter and now she's primed and starts right up.    is that a sign of a bad pump or something else? any advice?

[thepassionofcrust]

I have a 65 valiant...she runs great. but...as of late I need to pour gas into thecarb in order for her to start.  if I take the fuel line off after the filter- before the carb  it cranks out gas. any ideas??  thanks!