hello all! heres the deal: new rebuilt med cam 350. eddy 600. it wont idle. when i first start it it idles 7-800 rpm. the carb idle adjusting screws work. the carb works. then when it slighty warms up, it starts stalling and i turn the idle screws all the way shut and it keeps running.i can block off the top by cupping my hands over the carb and it still runs. i have all the vac ports capped except the pcv valve line. when i cap the pcv port it runs the same.ive spray the carb cleaner all around it looking for vac leaks and no change .when i take the fuel line off it a couple of minutes after running it the gas pops out of the line hard.this carb ran fine on my stock 350. the spark on my dist. is good. the engine runs good at high rpm. another thing is at idle the power brakes dont work. any help appreciated mike in nm.