Hi,

I'm Plamen, greetings from Bulgaria.

Can someone tells me how I can recognize if specific vehicle has MPI injection system or NDIS?

Most information in Internet says that the model is with direct injection, but on some places engine is described with multi point injection.
Even Wikipedia says that G37 start be producing with MPI and later they switched it to NDIS, but when and how it can be recognized - they don't say.

I'm interested of G37x sedan, but in my case I need vehicle to be with MPI system. Here in Bulgaria are very popular the LPG systems, but to be applied such one - the MPI fuel system is a requirement...

They are too few offers for that model in Bulgaria, and Europe at all, so maybe vehicle will be ordered from Canada or US (if that has some matter to my question).

Thank you for your time and looking forward to someone's advise.


Best regards!

 

As far as I know all G37's are MPI. Are you sure NDIS doesn't stand for Nissan Direct Ignition System (ie, coil on plug). The newer turbo engines are direct injected, but not the NA ones.

I can't imagine nissan using different injection types for different markets. Seems like wasted resources.

 

i am assuming you are referring to direct fuel injection into the combustion chamber correct? if so direct fuel injection injectors are not located on the intake manifold but mounted directly into the cylinder head. in addition if its direct fuel injection it operates on high fuel pressure meaning there is a mechanical fuel pump mounted on the cylinder head and running off the camshaft. btw why are you converting your vehicle to lpg? i hope you know that lpg engines are internally different than gasoline engine where valves, valve seats, pistons, rings have to be more resistant to the corrosiveness of lpg combustion.