D40 motor replacement

[Old.Tony]

The fuel rail can hit 30,000psi. It's not just a LOT of pressure, it's friggin' phenomenal. If you remove a component, re-using it after the metal has already been deformed once during its connection could make it a failure point.

The Nissan service manual is quite explicit - Nissan tell their own service people to never re-use fuel rail/injector components. It's not really Nissan BS - it might be designed to help them make a few more $ off the sale of the components, but it also guarantees that upon the reassembly, it's not going to leak (if done correctly).

The self-learning relates to the ECU learning your driving habits and adjusting fuel maps based on that. The harder you drive, the more the ECU tends to pump fuel in.

 

[anthonyh]

Had a chat to the head Nissan technician today and it was interesting to hear that he would not replace the fuel rail fittings and lines if he removed the injectors on his car, just the seats and washers. . They do it on warranty jobs in the workshop just to be overly cautious. He also stated that when I swap the engines over it is not necessary to input the injector codes on the new engine in to the ECM.
Just thought I would share it for others.

 

[Old.Tony]

So he's not worried about it on HIS car, but Nissan insist on it to prevent possible problems.

Good news on the injector codes too. On with the swap now, eh?