you will need to completely drain/syphon all of the diesel/petrol mixture from the tank. refill with about a gallon of petrol to start with. try to start it. you may need to turn it over for quite a while & when/if it starts it will smoke quite a lot. if it doesn't start, remove the spark plugs & give them a good clean & if you are competent enough clean the carburettor & fuel pump. it's unlikely any damage will be done because your car most likely has a carburettor (not fuel injection) & probably wont have a catalytic convertor.
jim
May 2010
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