just bought 83 f-150 351-w supercab shortbed. was sitting in barn for 3 years. bringing her back to life. changed out al the normal tune-up stuff, and the dang thing still wont start if the temp is below say 50 degrees. will finally start cold on warmer days, but seem to only want to fire when you let the key go back to the run position. if i ever get it started, and warmed up, the thing runs great!! help i am running out of hair to pull out

 

Try putting power straight to the coil, you might have a broken ignition wire on the start position, the wires going to the module red and white, one should have power when the key is in run and both ( i think) when in start.
Also check that your automatic choke is working.
Check this website.
http://www.autozone.com/addVehicleId...00c1528004b6ba

Im no expert but have saved my old 84 from the scrap heap more than once !

 

Sounds like no ignition power in the crank mode. (ignition switch) can be verified with a normal test light.

 

thanks to everybody for the advice- as soon as i can ill try both your ideas- have changed ignition switch,but it was a used one. didnt make any diff-- but why will it start so easy when it is warm outside?? this is killin me!!! and yes i put a new ignition box on it. that was the first thing changed. thanks again everybody HEY,, can anyone tell me if a ford 2-bbl carb will fit the intake under this dang vvi carb?? im about to think that is my problem! THANKS kp