Hi Kenton. The only ones of these that we have done have had faulty ecu's on the side of the pump, (Pump down the back of the engine). I assume that yours is that type. ?? If it is, then I think that you will find that it's a Y17 DT. They are the ones that suffer with Bad soldered joints in the ecu on the pump, You can remove the cover, resolder the joints and rebuild, This Normally cures the problem. The fault codes that are usuall logged with that problem are for Spill valve inactive. H.T.H.