I put together a 1989 GMC C3500 454 using $0E and cant pin down what to change to lean it out when it’s running cold, after start-up till about 150*F. It runs so rich it spits and sputters and if it dies I have to clear flood before it will start again. My dad just started his 78 cutlass with 403ci running $0D pfi last week and it is doing the same thing as my truck when cold. Any help is always appreciated!!

merry Christmas everyone