Update!

About 20 minutes after the last post, Martin showed up at the house with the truck. Now it runs like a top. He said all he had to do was adjust the fuel pump settings, which apparently can change with time. It's got 123,000km on it (much of it off-road), so things will need to be adjusted from time to time. Now it doesn't even smoke when we drive it!!!

And, as usual, he refused payment. We can all learn a lesson from Martin. God will reward those who have a servant's heart here on earth.