its a golf body with a built in polo enjin the owner says the car just died under his feet,if you use quik start it starts up all right and its fine but if u switch it off and try to start it again it doesnt wanna start,theres spark and feul but doesnt wanna start,where do i start looking for the probleme??some oak told me that it is the feul relay can it be true??

its an 2001 model,we know it as the jumbo polo the oak whos car it is bought it from somebody and he said the new owner said he did drove to work and when he wanted to go home the car didnt wana start up so the full service i dont know,we going to send the car to the agents now but it looks like its the key chip thats faulty