1980 Chevrolet C20 Scottsdale 8 Cyl 7.4L
why will my truck idle fine, but lose power when driving?
my truck idles fine, but when i get a half a mile or so down the road it cuts out and loses power like it's losing vacuum. i had the carb rebuilt a year and a half ago, it ran ok after that til now. i have used carb cleaner but that don't seem to help.
Ithink you may have answered own question, EGR or hose vacuum leak.