Looking for some help on my Dad's old International flatbed. The truck idles and runs ok under light load but seems to have a very slight miss. Going up hill the truck has excessive grey smoke and if you push it hard it will start to ping. Things tried/noticed /tested:My father removed the injectors and pop tested them. One injector was replaced because of a poor spray pattern. He also temporary installed an electric lift pump. Turbo boosts ok to 16 psi under load. Does not seem to have excessive blow by. It also seems to have used a gallon of oil in 1600 miles. It also seems a little low on power.

Karl Hafen
Manager
Zion Motors
Saint George, Utah, USA