Turbo? What Turbo?
I have had another play with my sick Toyota Surf. The symptoms are simple, drive along with a light foot (so the turbo does not kick in) and it goes like a dream. Put your foot down so that the turbo does kick in – and it doesn’t. The car coughs and splutters as it copes with being drowned in its own go-go juice.
I have ascertained before that the turbo and the bypass work correctly, so I stripped off all the pipework between the turbo outlet and plenum chamber. There is a lot of air coming out of the turbo, at very high pressure, so that works.
I stripped off all the pipework from the air filter to the turbo – big suction (whoops! where’s my hand gone!).
Put it all back together and – no turbo.
So, is there a restriction in the air intake at the filter lever or from open air? That is the next question to be answered – when it warms up enough to work on a tonne and a bit of cold metal again.
The car runs well, as long as the driver is very light-footed. And having a non-working turbo is not a case for MoT failure, so I may just get it on the road before the end of the month when the VEL is due on the other old bus.