I am still running into a starting issue with my 90 RRC. It has a long crank and won’t start until I give it gas. It will virtually start up with almost no issues in the mornings. It will fire up right away in the morning, but I need to give it some gas or it would stall out. Other than that I have a long crank and it won’t start until I floor the gas pedal, it basically acts like a flooded engine after the first start of the day. I have replaced the fuel pressure regulator, fuel pump, fuel filter, idle control valve, coolant temperature sensor, air boot, intake gaskets. The fuel temperature sensor looks brand new. I did notice that when I was checking the timing that there doesn’t seem to be any vacuum at the vacuum advance until I give it throttle. The current idle is about 750-800 RPM. I have also noticed backfiring thru the intake under a hard acceleration from a stop to merge into traffic. I also have this whiteish smoke blowing out the tailpipe. It smells like the exhaust has fuel in it. It is definitely NOT coolant.