I'm getting code 51 on my 91 TT. Did the screwdriver test and all injectors seem to be firing. Did the Ohm test and 5 of them reading between 13.9 - 14.3, and one is 9.8. Will I get away with changing the 9.8 one?.. I've checked around and it seems like normal reading on injectors for sale is around 11. That'll mean that it'll be 3 Ohms lower then the rest.