volkswagen polo classic 2000 mk3
 

Im having a hard time diagnosing my volks the engine is very hard to start, I had to loosen out the retaining clip on the fuel supply hose on the injector side then pull out the hose then start the engine, it starts then i fix back the hose and drive the car for a while when i stop the engine, it wont start again need to repeat the mentioned procedure!!!
anybody has any idea would be a great help!!