Injector cutout test

DYI style..
Get both connectors for the the harness where it plugs into the ECM
Wire your toggle switches to the new connectors.

I avoid splicing or cutting into harness when humanly possible.

 

What are you working on and what exactly are you trying to accomplish? What type of injector/fuel system? I would be nervous about accidentally shorting out the wiring and taking out the driver in the ECM. I certainly would never try it running. Injector voltages can be up there and knock you on your arse, maybe permanently.

 

Fry the ecm and you will have wished your spent 800 bucks on the proper tools for the job

 

If I was in your shoes and didn't have tooling to perform the test, what would I do you ask?

Invest in a Flir thermal imager. With a noticable miss there is lack of power. Where there is lack of power there is lack of heat. Shoot the manifold on start up or when it's missing and you have found your coldest hole and your likely offender. You also have a good data comparission that means something.

Plus you dont have to take anything apart. You also have the tool to use again on other issues.

 

An infrared temp gun is a very useful tool. I keep mine in the pocket behind the passenger seat and grab it every time I stop the truck. I'll walk around hitting the tires, axles and hubs.

 

I did this on my 6nz c15 but it took some trial and error. I blowed my test light but I figured out that if you touch anything that uses electricity to the injector wires ( where they connect to the injector) it will cut out that injector because then it don’t have enough volts to fire the injector. Also do not touch the wires with your bare hands lol it will light you up. Worse than a spark plug.