Hi guys, as title Scirocco CR140 fuel pressure fluctuating on live data jumping from 200-400bar at idle.
Had a fuel pressure regulation fault code which I deleted and didn't save (schoolboy error!) but regardless of that the engine is running rough , especially when cold, it surges on accel. for the 1st couple of miles or so in a journey. Even when hot the idle is 'stumbly'.
I'm dreading it needs a HPFP as they are about a grand UKP, but I did some Googling at found it could be the fuel pressure regulator thats fitted to one end of the common rail. Darkside developments sell these for £175.
I've got no means of doing a leak off check on the injectors.
Of course the more I Google the more I see doom and gloom of pump failure, swarf blocking up the injectors etc.
Anyone else had a similar issure and what was the cure?