26-08-2014, 06:21 PM
The later HDI's are plumbed slightly differently to reduce the pulse knocking noise.
The high frequency whistling noise might be sign of your pump struggling. It might be worth checking the pump to see if anything is restricting it's flow.
An OEM fuel filter could also help as that will be more "tuned" for the system.
The high frequency whistling noise might be sign of your pump struggling. It might be worth checking the pump to see if anything is restricting it's flow.
An OEM fuel filter could also help as that will be more "tuned" for the system.