I need some help trying to figure out what is going on with my rig. I have a 1986 K20 Silverado Suburban. 3/4 ton, 4x4, 5.7L gas 350 no A/C. Recently it started blowing white smoke upon start up and immediately dissipates. Its been running hot, normal running temp is 210, now it stays around 235. On really hot days it will die while driving slow (in parking lots and driving down our driveway). There is no coolant leaking, oil isnt milky. Its running rich also.
I'm not sure where to start...
Thanks