HELP!! Diesel T25 Transport Problem
 

HELP!!! I'm sure someone on here might know whats up with my 1986 1.6 diesel T25 transporter.

When you're driving along the power suddenly stops and the engine cuts out, crank it over a few times and it fires up again. In a quick 2 mile journey it'll probably do this about 3 or 4 times!

On top of this its smoking loads, grey smoke thats more dieselly than oily.

it idles fine and it just doesn't seem to make any difference whether its cold or hot.

so far i've replaced the fuel line from the tank, the air filter, the fuel filter and the fuel filter housing. any ideas? it's driving me nuts.