Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 1999 Nissan navara (d22) 2.5 4wd Low diesel › Reply To: 1999 Nissan navara (d22) 2.5 4wd Low diesel August 23, 2020 at 8:47 am #963246 Richard KirshyParticipant Before you start tinkering with adjusting the pump. Might suggest you check / replace any fuel filter(s)and look for any possible fuel flow restrictions.