#4 injector not pulsing,stays hot all the time?

1995 SUZUKI SIDEKICK

1.6L • 4 CYL • 4WD • MANUAL

VINNYS 49

MEMBER
1 POST

#4 injector not pulsing,stays hot all the time. Put new injector,used pcm.white smoke from tailpipe. Bad gas smell. Noid light is very bright and does not pulse

Feb 1, 2015 at 5:18 AM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,240 POSTS

Have you checked for a possible ground issue or a short to power?

Feb 1, 2015 at 9:26 PM

STRAILER

✓Experienced Mechanic
55,221 POSTS

Yes, because the fuel injector has power all the time and the PCM uses the ground circuit to pulse the fuel injector. It sounds like you have a bad ground for the PCm, here is a guide to help you test the grounds and the PCM wiring diagram so you can see how the system works and where the grounds are.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

I have marked the grounds for you so you can do the testing. Check out the images (below). Let us know how it goes

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Aug 2, 2024 at 5:04 AM