6th gear is an overdrive gear and will not pull whatsoever, above 80 ish an its alrite, have you had the modified fifth injector fitted? also have themcheck the egr valve for clogging up, i personally have had over fifty mpg out of the diesel, and i know of 1 tech getting 61
Any idea what the 5th injector refers too? As far as I have seen, a cylinder head has only one injector per pot. Is this refering to the main diesel rail? If anybody can explain, would be grateful.