Replacing Fuel Injectors (1 Viewer)

[2001LC]

All injector part numbers are labeled 23250-50040. Here is photo comparing 99 UZJ100 injectors, to 98 UZJ100 injectors.

Top right injector is 99UZJ injector. Has more of a straight sleeve at the opening. With 2 indentions sticking out. I have yet to flow test these. Just pulled them.

Botom left: 98UZJ. Has more of a conical sleeve at the opening. No indentions.

View attachment 3094863

Lowers screen appears to protruded more, which may just need pushing down to make flush. Screen may change with year made, factory or rebuilt (Aft mkt or OEM). I know our local FI specialist (FIS) use non Toyota screens.

I see lower has it's O-ring, upper does not.

The only 4.7L FI difference I know of, is with 4.7L VTT engine's FI. As mentioned above by others, year and which Denso plant manufacturers, will produce minor visual differences. But all points where wire housing, fuel rail & intake manifold connect are (should be) the same. The screens only make contact with FI, not the rail. A smaller screen opening and shape of open "may" effect flow IDK.

2001 FSM

FIS service of 02LX injectors

 

[2001LC]

When to Clean or Replace fuel injectors

Please post your experiences and thoughts on the subject. I’ve been considering cleaning or even replacing all 8 fuel injectors, is this wasting time and money. I understand keeping fuel injector clean by adding a can of additive to the gas tank, now & then, is a good practice. This keeps them...

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