I have a 74 2.0L engine with 1 leaky green top injector. I have a line on a replacement in short order but they are for 1.8L green top injectors. I read that the 1.8L injectors may flow a bit less, but it wasn't confirmed. Whats the difference? Am i good to go for it?

-Ross

No, one reason is that they have different electrical connectors.

Double Post

Different electical connections and they flow 1/2 what the 2.0 injectors flow.

Wow,

1/2 is a huge difference.

I wonder if this is a simple way to pass an emmissions test

Nope. In fact, HCs will probably go up because the mixture will be too lean to easily burn. If, in fact, it runs at all.

--DD

The reason for the 1.8L injectors being half the flow is due to the way the FI systems differ. The D-Jet system has trigger points that pulse the injectors once per revolution, resulting in a semi-sequential injection system. The L-Jet system pulses the injectors every time the coil fires. This is a batch injections system, and it injects half the fuel onto the back of the closed intake valve, and the next pulse injects the rest.

Don't try to sub L-Jet injectors for D-Jet injectors. It doesn't work.

The Cap'n also tells us that the Bosch reps trained the mechanics never to swap injectors between D-jet and L-jet systems because you can fry the ECU. I'm not exactly sure of the mechanism of that, but those were the guys who designed the system, so...

--DD

Thanks for the input everyone. I'll stick to PN 0 280 150 019 !

.......Cap'n.....explain that 1,......please??

Are the L-jet 0280150105 injectors interchangable with the 0280150112 injectors?

The specs on the sheet look identical.

Digging in the brain for this one, which I knew well once.

What I remember is that the L-Jet simplified and improved longevity/reliability on the L-Jet by running a ground for all the injectors out through a resistor pack, this reduced the load on the injectors and the ECU.

I'll dig some more.

It is my understanding they are both 022 906 031C and can be interchanged.

It's not the grounds, it is the power feed for the injectors that run through the resistor pack. The ECU actually switches the injectors to ground.

FYI.. .the same resistor pack, with a different plug, was used on all the 1980s Datsun/Nissan cars that came with the licensed built L-jet system, including the 280ZX.