I'm anxious to see what the cause of the problem turns out to be and what the solution is. After all, when you first posted here, you couldn't drive over 30mph. Now that those other problems have been addressed, I want to see you driving your truck.
What exactly is "lead replacement petrol"? Do the fuel companies actually add some sort of "instead o' lead" snake oil to the fuel? Nothing like that has been done here in the USA since 1974 and the predicted catastrophe has never happened. Cars that used to run on leaded gasoline didn't suddenly self destruct and the exhaust valves didn't burn.
Most people forget or never knew that AMOCO introduced its famous super unleaded "white gas" in 1923. Cars have been running unleaded for 100 years without any major issues.
My daily driver Cadillac has been running on unleaded gas for the last 23 years and 100,000+ miles.
