1 Injectors not firing / how to test ecu and harness Fri Sep 06, 2019 3:52 pm
futech
active member
Been going through the basics of getting her up and running since the previous owner had her sitting for over a year, and just found that the injectors aren’t firing. I pulled the injector rail and confirmed and ran some tests. Fuel pump and regulator seem good since fuel pressure is at the 36psi. Each injector fires when 12V is manually applied, and each connector is receiving a signal when starter is pushed (however each is receiving a 10.8V signal rather than 12V). At this point I figure it’s either the ecu wiring harness, or the ecu itself, but not sure how to test that. Would anything else prevent the injectors from firing? Any suggestions on how to test ecu or ecu harness/connector?