Yet another phase 2 injector fail

[Foosblood24]

Ok, aside from age (and it just might be the only factor) what else causes a phase 2 injector to fail?

[ThisIsSparTTa]

Running your gas tank dry and sucking up all the crap on the bottom of it? Filling up at a gas station where the tanker is filling the tanks puts a ton of sediment in the gas too. Transient voltages and stuff in the car's electrical system could be an issue too. Or possibly even bad grounding if you are getting large difference in voltage potentials between different places in the car.

[Foosblood24]

Running your gas tank dry and sucking up all the crap on the bottom of it? Filling up at a gas station where the tanker is filling the tanks puts a ton of sediment in the gas too. Transient voltages and stuff in the car's electrical system could be an issue too. Or possibly even bad grounding if you are getting large difference in voltage potentials between different places in the car.

Very good points! I think the first thing I have to do (once the damn injector problem is fixed....again) is to check or just straight up replace the fuel filter and change out the wiring harness.

Is there any way possible, besides removing the gas tank, to get that crap at the bottom cleaned out of the tank?

[ThisIsSparTTa]

I'd double check with someone else, but I believe I've been told that you could remove the hose right before the fuel filter and drain your fuel into a container while the fuel pump is on (when the key is ON).

[DCaff300ZX]

Regarding your injectors, two things make them fail: Ethanol being used in gasoline, and the constant voltage-on state of the injectors in a 1990-1994 Z32. Using Ethanol in gasoline is not good for the early ('90-'93 TT, NA) injectors, and really any of them, due to the alchohol and water which "helps" the wet tip type injectors Nissan decided to use have an electrolysis issue with current running through them constantly. Nissan themselves addressed this issue with the new style injectors by 1994, and the final step in 1995 they wired the ignition and injectors differently to a key-on state instead of always on. There used to be a how-to on the switched injector wiring mod, which I have and have done to both of my Z's, but that how-to no longer exists on TT.net.

[zswap0429]

There is also a fuel drain on the bottom of the tank. Like an oil drain plug

[Foosblood24]

Regarding your injectors, two things make them fail: Ethanol being used in gasoline, and the constant voltage-on state of the injectors in a 1990-1994 Z32. Using Ethanol in gasoline is not good for the early ('90-'93 TT, NA) injectors, and really any of them, due to the alchohol and water which "helps" the wet tip type injectors Nissan decided to use have an electrolysis issue with current running through them constantly. Nissan themselves addressed this issue with the new style injectors by 1994, and the final step in 1995 they wired the ignition and injectors differently to a key-on state instead of always on. There used to be a how-to on the switched injector wiring mod, which I have and have done to both of my Z's, but that how-to no longer exists on TT.net.

Ok, but I thought the whole concept behind the phase 2's were their ability to not be compromised by the ethanol