Engine runs rough after warm up
Any ideas why my truck could be running rough after warm up? It runs perfect at cold start up but after about 1/2 hour or so during normal driving conditions the truck will start to miss,spit,and stall. And when it cools down it runs great again........WTF!
My truck is a 1991 Ford F-250 with 408W and a 9psi Powerdyne. The truck was converted to massair and I'm running 42# injectors w/ a Pro-M 75mm cald for 42# injectors MSD BTM and MSD dizzy.
Any suggestions would be great. It's gotta be something small.
91 Ford F-250 4X4,40" Boggers
408W Powerdyne 6 psi, Ported Edelbrock truck upper/lower intake,FMS mass air conversion ( A3M1 ),PMAS 95mm MAF, FMS 42# injectors, 5.13 gears w/Moser axles.