Colesie

I have a 1986 Subaru XT turbo 1.8. I have a really noisy fuel pump and noting I have done has fixed it. So far I've replaced the pump, Replaced the fuel regulator, Cleaned out the tank, Changed old fuel pipes and still after 10 minutes of running the pump starts to buzz like mad and you can feel it though the car. Any suggestions will be much appreciated 👍