I have a holley 600 carb with vaccum secondaries on a 350 with a small cam. I just changed the power valve in it and cranked it and now it wont idle and loads up but as soon as you open the throttle it goes away. The car has sit for a couple of weeks and needed a power valve so I put it in and now it wont run at idle in park or drive but when you slam the throttle it will run just as ggood as any. I wonder if there is any trash in the carb because I sprayed out the passages in the metering block before I put it back together. There is also a lot of trash and dirt in the see through fuel filter . Please respond because it is driving me craszy and I want to drive my car again.