Hi Euro boy, K&Ns wash up good. I used K&N cleaner and oiler on the BMC, it is easier to get hold of than the BMC stuff and I'm sure the same. The K&N lost some of its shiny plating and wasn't easy to get a good bracket to support it. it sort of hung like a triffid and looked a bit crappy. So I thought I'd try the BMC which came free with the car.
MSTV I was worried about one of the lambdas as one did get splashed a bit from some coolant leak when it was disconnected siting on the floor. That said I have plugged in Fiat ECUscan and there are no lambda codes just codes for the MAF when I disconnected it to try with it unplugged. I cleared the codes and drove a few miles and the codes did not return. The hesitation , which almost feels the same as fuel starvation, gets worse when the engine warms up, so perhaps I did not drive it far enough?
Most reports of Maf are flat spots and idling. This is rough running below 3250, and then off like a hooligan to the redline. It didn't feel much different with the maf disconnected so I am not sure. Do all knackered mafs show error codes?
Did some reading up today on MAFs so I feel a little happier that the Bosch maf from an astra is the same ( not the same tube, but the same sensor) and much cheaper at about £78 compare to the V6 price of £180. Still don't really want to pay it if I have got an air leak or dodgy connection and find out the old one was good.
Found some disturbing pictures of the inside of a copy Maf compared to a bosch one. The circuits were terrible and simplistic and i am now quite happy to pay the premium if needs be.
On a positive side the single mass flywheel and GTA clutch is FAB. As light as a ford focus and it revs much easier. It is very noticeable.