Intermittent poor running and performance issues for some months.

Customer described symptoms as a misfire and lack of performance.

Vehicle had been to us previously but unable to fault.

Genuine diesel fuel filter replaced as requested by workshop who provided the vehicle to us.

Was test driven but unable to reproduce any issues. After this owner went to the dealer and they replaced the fuel rail pressure sensor and did an upper cylinder intake clean with the same intermittent result.

On this occasion some two months later the vehicle came back.