Hi, i have a vw polo 1.4 1997. Just the other day the wouldnt start. Prior to this the car would take some time to start. Now it doesnt start at all. Could it be a blocked fuel filter. i have spark to the spark plug, just changed the fuel pump n it works, fuses are fine, just not getting any fuel to the fuel isolator valve. Any held would be great guys. Thank im outside working on it right now.