Fuel Injectors K-Series 1.8 MEMS1.9

Original Injector

Since I noticed that the fuel economy was not all too good I started suspecting the injectors, as this was one of the very few parts that I never changed. I remember years back that I noticed that the fuel economy seemed to suddenly get worse, that was also around the time that car started struggling with annual MOT due to emissions.

Since a few weeks the car is back on the road after many years, this time with a different engine sourced from an MG, still a MEMS 1.9. I used the inlet manifold from the MG but kept my fuel rail and injectors as the MG had different ones.

Now looking at the fuel economy being not all the best, around 1 litre per 9.3 kilometre, I started looking for options to play around with injector options. Here is what I found so far:

The cars injectors originally have part number MJY10015L according to the official Land Rover Freelander Parts Catalogue. Which as far as I can find is a Bosch 0280150703, according to motorwestperformance.com the flow rate is 155cc / min @ 3 bar and has 16 Ohm resistance.

Thing is that if I would not have a parts manual I would go to a webshop, select the Freelander 1.8 and I would end up buying this one (also because of price): MJY100550TO. Which also appears to be a Bosch with part number 0280155885 and according to motorwestperformance.com has a flow rate of 150cc / min @ 3 bar and has 15 Ohm resistance. However, on this website you'll find more and different specs: www.injectorplanet.com

All-in-all I'm a bit lost on this and also don't really know if my injectors can be in a bad state or that this part number have been superseded by a better/different type.

I'll see to fit some different injectors I have from MG parts and will see to get som slow motion videos of the spray pattern and see what fuel economy does.

Any thoughts and insights are welcome!

Below a recording of the injectors in slow motion after cleaning the by forcing injector cleaner through time: