Got a problem with one of the injectors on my 3vze, it’s constantly open. Wondering if the injectors are controlled by the ecu or a seperate controller?

 

You don't mention the year of your truck, and it matters.

Having said that, as far as I know, the ECU controls the injectors. BUT: A single injector remaining full open all the time sounds to ME, for what that's worth, that the injector is bad, not the controller.

Have you unplugged the electric connector to the injector in question, and checked to see if it's still wide open? That would tell the tale of whether it's the injector, or it's controller. If it remains wide open with the electric connector unplugged, it's the injector, no question.

Good luck, and keep us up to date
Pat☺

 

the injectors open at the same time. all six. so, if the other five are working, the issue is elsewhere.

 

It is a 1994 4runner, i recently changed all the injectors for some i bought on ebay, can i check them by just blowing through them?
thanks for the reply! -mike

 

alright but i just changed them all... can the problem be in the wiring? Do they actuate when they get a pulse of power or ground? Thanks fro the reply!
-mike

 

Apply 12V to the one you suspect is stuck and see if it cycles open or closed.

I would not trust chinese eBay fuel injectors. OEM is a must for these trucks in this instance.

 

^^^this!!!

i've looked at your other threads on this. not that i'm an expert by any stretch, but it occurred to me a problem in the wiring....like a short or something. ie. perhaps instead the voltage signal pulsing it's remaining a constant feed sans pulsing. just speculating

you've gotten really dynamite/expert input in other threads. give up the idea of the ECM/injector drivers.