The pressure control valve duty cycle is switching off trying to bring the pressure down. So i throught it was sticking so i replaced it. While the pump was off i changed the volume control valve as well.
The fault stayed the same. The volume control valve duty cycle is over 30% when the fault is at its worst. I think the ecu is opening the volume valve to much and the pressure valve can't lower it enough.
Is there any inputs to the ecu that controls this? Or anything inside the pump that might cause this?
The pressure into the pump is 1 bar. The return pressure from the pump is 1 bar.
I have connected a very high pressure gauge onto a injector pipe to confirm the pressure sensor is reading right.
Sorry for the long post, Thanks for looking. Ian
Re: Jaguar S Type
Posted by Piotr Sokolowski on January 22, 2015, 9:29 pm, in reply to "Jaguar S Type"
I had similar issue and p2288 on jag s type 2.7. New fuel filter- genuine , pressure regulating valve and inlet volume valve replaced- fault still there . So I started to think : how ecu knows there is new valves been fitted.I try to find some kind of adaptation - nothing available . So I made my own way of adaptation . Started the car , left it idling untill reached working temp . Took it on road test but gently with accelerator because car was going to the limp mode and p2288 logged in . After 5 miles road test and off/on ignition when fault recorded - it started to work . I think ecu noticed there are new parts been fitted( current monitoring?) . All fine since then .I hope it will help you .