When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
no power to fuse block for both fuel injector fuses
Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Re: no power to fuse block for both fuel injector fuses
No, not the ECM. It provides a ground to the injectors.
Not knowing what year, model or EFI type of the vehicle in question, only suggestion I can make it to check the fusible links at the starter. Could also be an ignition switch issue.
Re: no power to fuse block for both fuel injector fuses
Might want to check the fuse/connection at the pigtail off the batt cable, right close to the batt. (if whatever car you're working on is among the years/models that have that)
Re: no power to fuse block for both fuel injector fuses
I am running out of options, have tried everything everyone has suggested and still no power to injectors. I know I have asked this before but could bad ECU cause this?
Re: no power to fuse block for both fuel injector fuses
A failed ECM will not cause this. Study the diagrams. Power is provided by the injector fuses, and as was previously mentioned, the ground side of the injectors is switched by the ECM.
If there is no 12V supply present at the injector harness with the ignition on it is not the fault of the ECM.
Re: no power to fuse block for both fuel injector fuses
The 12V supply must come from the ignition switch, terminal C2, via a pink wire. It routes through a splice pack, S164 to fee the INJ1 and INJ2 fuse bus and the distributor. The pink wire connects to the rear of the fuse panel.
Re: no power to fuse block for both fuel injector fuses
Originally Posted by ryan proctor
I checked other locations on the fuse block and they have power but none to the 2 fuel injector fuses, ECM?
Something is fishy here.
Look at these schematics:
If you are correctly checking for power at the fuse on the fuse block for the Injector 1/2 fuses and not getting a 12V + reading than you should also not have power at the TURN B/U fuse. If you have power at the TURN B/U fuse than the only explanation is that the connector between the power wire and fuse is bad. That's all there is there. Multiple wires feed from that splice from the switched power wire from the ignition and if they aren't bad...
If there is also not power at the TURN B/U fuse then it is probably a problem with the ignition switch.
Re: no power to fuse block for both fuel injector fuses
Update: I read in antoher thread something about the ground wires comining from the back of the heads to the firewall and to make sure they are connected. Well one was not it had completely broken off. I managed to reconnect and now the injectors pulse and the car starts right away. It seems this was the problem, is that possible?
Re: no power to fuse block for both fuel injector fuses
Originally Posted by ryan proctor
Update: I read in antoher thread something about the ground wires comining from the back of the heads to the firewall and to make sure they are connected. Well one was not it had completely broken off. I managed to reconnect and now the injectors pulse and the car starts right away. It seems this was the problem, is that possible?
Possible that it kept the engine from starting & running, yes, very possible.
Possible that it caused a lack of voltage on the INJ1 & INJ2 fuses, no.
09-28-2016, 09:43 AM
