I have a 66 fury III with a 318 poly. It is my daily driver & up untill today it ran well. I recently replaced several parts, did a full tune up & I have been driving it daily without many problems. I did have a problem with the connections going throug hthe firewall but I have solved them. The car has great spark, it's getting fuel & I don't think the timing chain slipped. It will start & run great if I keep the RPMS up but the second I let my foot off the gas it dies! I'm am out of ideas. Anyone?

 

found it. originally i thought it was a stuck metering rod. but i found a clogged jet.