Thanks Graham.

I did the fuel system check two weeks ago. Pressure is 28 psi. Pressure wouldn't hold, so I carried on with the tests in the service manual, and found two leaking injectors (already mentioned). Had all injectors serviced - now no leaks, but it looks as if there is a problem with the ball-valve on the return to the fuel pump. I thought I'd leave that for the moment.

I'll do the propane test tomorrow (evening) I hope.

I want to check with the local equipment rental people to see if I can get an exhaust gas analyzer. I realize that I can't do any proper adjustments with out one. At present, it would be good just to get the car running without clouds of smoke!