Injector #4 /ECM

[stefanjay]

Hello,
This is my first time on this forum and I am stumped. Have a 1991 240SX and injector #4 is not getting a signal. Checked the wiring harness and resistance is good. Is the ECM faulty? Is there a way to test it? Have had the car for 12 years and we are starting over at the beginning as a learning project for my teen. Any ideas anyone?

[wa-chiss]

Well, if you've checked the power feed and the ground circuit for that injector and all is well, the only thing left is the ECM.

[danshaz82]

it could just be the injector itself. the KA loves to foul injectors. i just replaced 1 and 2 on mine within a few month of each other. try and get a hold of another injector and switch it out.

[stefanjay]

Thanks for the input. I'm sure it is the ECM...used a noid light and then checked the harness, injectors are new. I was just hoping it was something cheaper. This would be the 3rd ECM. Does the KA like to eat them?