Smartin Posted June 30, 2015 Share Posted June 30, 2015 I made a post in the progress thread on this, but thought I would get a better response pulling it into its own thread. Attempting to start the 54, no fuel. I pulled the fuel line off the carb and could feel a light push, but no real pressure as the engine turned. I then used a mity-vac to pull the fuel through the line to the carb. I then tried to start again. As I was cranking the engine, I completely smothered the carb with my hand, and fuel ended up sucking into the carb and started the car. It runs great once it starts. Why am I not getting any pressure to begin with? RPMs too low to pump the fuel? Or is there an issue with the pump that is keeping it from pushing at cranking RPMs? Link to comment Share on other sites More sharing options...
TexasJohn55 Posted June 30, 2015 Share Posted June 30, 2015 Fuel pumps are inefficient at pumping air. It takes awhile even with a good pump if the line to the tank was completely empty. I had this issue after sitting a long time, fuel had dripped out a tiny pinhole in the steel line, had to pressurize the tank to push fuel up to the engine. Haven't had to do that lately. If it cranks up ok now and runs good, maybe it is ok. Otherwise just tee in and check the fuel pressure at the carb then run the line into a bucket and measure flow by the shop manual at cranking speed with coil disabled. 1 Link to comment Share on other sites More sharing options...
Smartin Posted June 30, 2015 Author Share Posted June 30, 2015 Ok I just got home, and tried to start the car since it sat all night. Flipped the choke on and it started up on the first revolution. I guess this is problem solved. Thanks for the insight, John! On to the Brakes... Link to comment Share on other sites More sharing options...
Fr. Buick Posted July 2, 2015 Share Posted July 2, 2015 I find these carbs go dry quickly from heat and time. If I put it away hot and let it sit for over a week, it will take a while to get fuel to the engine and fire up. And if the fuel pump is a little iffy, it would compound the problem. Link to comment Share on other sites More sharing options...
avgwarhawk Posted July 6, 2015 Share Posted July 6, 2015 If my Carter sits for a week it takes a wee bit of crank time to start. Sometimes fires right up and dies as it burns what was left in the bowls from a week ago. Basically getting gas to the carb takes a few cranks. If I start the engine the next day it will fire up on first crank as the bowls are full of gas. Sitting allows for gas to evaporate from the carb. Gas drains back to the pump/tank. Link to comment Share on other sites More sharing options...
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